An Aegean Airlines stewardess wearing personal protective equipment (PPE) is seen on a flight transferring refugees and migrants from overcrowded migrant camps to Britain, where they will reunite with their families, amid the global outbreak of the coronavirus disease (COVID-19), at Athens International Airport, Greece, May 11, 2020. REUTERS/Alkis Konstantinidis

An Aegean Airlines stewardess wearing personal protective equipment (PPE) is seen on a flight transferring refugees and migrants from overcrowded migrant camps to Britain, where they will reunite with their families, amid the global outbreak of the coronavirus disease (COVID-19), at Athens International Airport, Greece, May 11, 2020. REUTERS/Alkis Konstantinidis

Aegean Airlines stewardesses wearing personal protective equipment (PPE) are seen on a flight transferring refugees and migrants from overcrowded migrant camps to Britain, where they will reunite with their families, amid the global outbreak of the coronavirus disease (COVID-19), at Athens International Airport, Greece, May 11, 2020. REUTERS/Alkis Konstantinidis

Aeroflot stewardess attends a media presentation of the airline's first Airbus A350-900 aircraft at Sheremetyevo International Airport outside Moscow, Russia March 4, 2020. REUTERS/Maxim Shemetov

Stewardesses and journalists board the first Airbus A350-900 aircraft of Russia's flagship airline Aeroflot during a media presentation at Sheremetyevo International Airport outside Moscow, Russia March 4, 2020. REUTERS/Maxim Shemetov

Stewardesses walk near an Arkia Israeli Airlines Embraer ERJ-195AR plane at Ramon International Airport after an inauguration ceremony for the new airport, just outside the southern Red Sea resort city of Eilat, Israel January 21, 2019. REUTERS/Ronen Zvulun

A stewardess is seen inside of Embraer 195 plane during presentation of Airline Belavia and Wargaming, the developer and publisher of the World of Tanks, joint project "Tankolet", at the National Airport Minsk, Belarus December 12, 2018. REUTERS/Vasily Fedosenko

Stewardesses are seen inside of Embraer 195 plane during presentation of Airline Belavia and Wargaming, the developer and publisher of the World of Tanks, joint project "Tankolet", at the National Airport Minsk, Belarus December 12, 2018. REUTERS/Vasily Fedosenko

A stewardess is seen inside of Embraer 195 plane during presentation of Airline Belavia and Wargaming, the developer and publisher of the World of Tanks, joint project "Tankolet", at the National Airport Minsk, Belarus December 12, 2018. REUTERS/Vasily Fedosenko

Turkish Airlines stewardesses walk at a terminal of the Istanbul's new airport prior to the official opening ceremony, in Istanbul, Turkey, October 29, 2018. REUTERS/Murad Sezer

A Turkish Airlines stewardess poses at a terminal of the Istanbul's new airport prior to the official opening ceremony, in Istanbul, Turkey, October 29, 2018. REUTERS/Murad Sezer

Turkish Airlines Stewardesses pose at a terminal of the Istanbul's new airport prior to the official opening ceremony, in Istanbul, Turkey, October 29, 2018. REUTERS/Murad Sezer

Stewardesses of Eurowings, a low-cost airline and fully owned subsidiary of German Lufthansa Group, salute as Eurowings opens a new route from Duesseldorf to New York, in Duesseldorf, Germany, April 27, 2018. REUTERS/Wolfgang Rattay

A stewardess of Eurowings, a low-cost airline and fully owned subsidiary of German Lufthansa Group, poses inside an Airbus A340-300 with a business class section, as Eurowings opens a new route from Duesseldorf to New York, in Duesseldorf, Germany, April 27, 2018. REUTERS/Wolfgang Rattay

A stewardess of Eurowings, a low-cost airline and fully owned subsidiary of German Lufthansa Group, poses inside an Airbus A340-300 with a business class section, as Eurowings opens a new route from Duesseldorf to New York, in Duesseldorf, Germany, April 27, 2018. REUTERS/Wolfgang Rattay

A stewardess of Eurowings, a low-cost airline and fully owned subsidiary of German Lufthansa Group, poses in front of an Airbus A340-300 with a business class section, as Eurowings opens a new route from Duesseldorf to New York, in Duesseldorf, Germany, April 27, 2018. REUTERS/Wolfgang Rattay

A stewardess of Emirates Airlines, stands in the first class during a presentation of Emirates' Boeing 777 at the airport in Hamburg, April 11, 2018. REUTERS/Fabian Bimmer

Singapore Airline stewardesses leave the airline's Boeing 787-10 Dreamliner after showcasing the plane's interior at the Boeing South Carolina plant in North Charleston, South Carolina, U.S., March 26, 2018. Picture taken March 26, 2018. REUTERS/Randall Hill

Singapore Airlines stewardesses Karie Choo (L) and Joslyn Hue pose for photos in the business class section of the 787-10 Dreamliner after a delivery ceremony at the Boeing South Carolina plant in North Charleston, South Carolina, U.S., March 26, 2018. Picture taken March 26, 2018. REUTERS/Randall Hill

Cheryl Ho, a stewardess with Singapore Airlines, stands in the business class area of the airline's Boeing 787-10 Dreamliner after a delivery ceremony at the Boeing South Carolina plant in North Charleston, South Carolina, U.S., March 26, 2018. Picture taken March 26, 2018. REUTERS/Randall Hill

Stewardesses with Singapore Airlines stand in the business class section of the airline's Boeing 787-10 Dreamliner after a delivery ceremony at the Boeing South Carolina plant in North Charleston, South Carolina, U.S., March 26, 2018. Picture taken March 26, 2018. REUTERS/Randall Hill

A stewardess with Singapore Airlines walks through the economy seating of the airline's Boeing 787-10 Dreamliner after a delivery ceremony at the Boeing South Carolina plant in North Charleston, South Carolina, U.S., March 26, 2018. Picture taken March 26, 2018. REUTERS/Randall Hill

A stewardess with Singapore Airlines talks with media during a presentation of the interior of the airline's Boeing 787-10 Dreamliner after a delivery ceremony at the Boeing South Carolina plant in North Charleston, South Carolina, U.S., March 26, 2018. Picture taken March 26, 2018. REUTERS/Randall Hill

A Singapore Airlines stewardess poses for photos in the newly-launched suites cabin of their A380 at Changi Airport in Singapore December 14, 2017. REUTERS/Edgar Su

A Singapore Airlines stewardess poses for photos during a tour of the newly launched business class cabin on their A380 aircraft at Changi Airport in Singapore December 14, 2017. REUTERS/Edgar Su

A Singapore Airlines air stewardess poses for photos during a tour of the newly launched business class cabin on their A380 aircraft at Changi Airport in Singapore December 14, 2017. REUTERS/Edgar Su

A Singapore Airlines stewardess folds up the leg rest of a seat in the newly-launched premium economy class cabin of their A380 aircraft at Changi Airport in Singapore December 14, 2017. REUTERS/Edgar Su

A Singapore Airlines stewardess poses for photos during a tour of the newly launched business class cabin on their A380 aircraft at Changi Airport in Singapore December 14, 2017. REUTERS/Edgar Su

An air stewardess presents the newly launched Economy Class cabin during a Singapore Airlines event in Singapore November 2, 2017. REUTERS/Edgar Su

An air stewardess presents the newly launched Business Class cabin during a Singapore Airlines event in Singapore November 2, 2017. REUTERS/Edgar Su

Director of the Dornier Aviation & Aerospace Museum David Dornier (L to R), former Lufthansa flight 181 co-pilot Juergen Vietor, former passenger Diana Muell and former stewardess Gabriele von Lutzau pose in front of the fuselage of a Lufthansa Boeing 737-200, also known as Landshut, transported aboard of a Russian Volga-Dnepr Airlines Antonov An-124 aircraft after its arrival at the airport in Friedrichshafen, Germany September 23, 2017. REUTERS/Arnd Wiegmann

Director of the Dornier Aviation & Aerospace Museum David Dornier (L to R), former Lufthansa flight 181 co-pilot Juergen Vietor, former passenger Diana Muell and former stewardess Gabriele von Lutzau pose in front of the fuselage of a Lufthansa Boeing 737-200, also known as Landshut, transported aboard of a Russian Volga-Dnepr Airlines Antonov An-124 aircraft after its arrival at the airport in Friedrichshafen, Germany September 23, 2017. REUTERS/Arnd Wiegmann

Former Lufthansa flight 181 co-pilot Juergen Vietor, former passenger Diana Muell and former stewardess Gabriele von Lutzau (L -R) pose in front of the fuselage of a Lufthansa Boeing 737-200, also known as Landshut, transported aboard of a Russian Volga-Dnepr Airlines Antonov An-124 aircraft after its arrival at the airport in Friedrichshafen, Germany September 23, 2017. REUTERS/Arnd Wiegmann

Former Lufthansa flight 181 co-pilot Juergen Vietor, former passenger Diana Muell and former stewardess Gabriele von Lutzau (R to L) pose in front of the fuselage of a Lufthansa Boeing 737-200, also known as Landshut, transported aboard of a Russian Volga-Dnepr Airlines Antonov An-124 aircraft after its arrival at the airport in Friedrichshafen, Germany September 23, 2017. REUTERS/Arnd Wiegmann

Former Lufthansa flight 181 co-pilot Juergen Vietor, former passenger Diana Muell and former stewardess Gabriele von Lutzau pose in front of the nose of a Lufthansa Boeing 737-200, also known as Landshut, transported aboard of a Russian Volga-Dnepr Airlines Antonov An-124 aircraft after its arrival at the airport in Friedrichshafen, Germany September 23, 2017. REUTERS/Arnd Wiegmann

Former Lufthansa flight 181 co-pilot Juergen Vietor, former stewardess Gabriele von Lutzau and former passenger Diana Muell (L to R) pose in front of the fuselage of a Lufthansa Boeing 737-200, also known as Landshut, transported aboard of a Russian Volga-Dnepr Airlines Antonov An-124 aircraft after its arrival at the airport in Friedrichshafen, Germany September 23, 2017. REUTERS/Arnd Wiegmann

Rugby Union - Singapore Sevens - National Stadium, Singapore - 16/04/17 - A Canada's fan shows his support from the stands next to spectators dressed as Singapore Airlines flight stewardesses. REUTERS/Edgar Su

Formula One - F1 - Singapore Grand Prix - Marina Bay, Singapore- 18/9/16 Singapore Airlines stewardesses wait for drivers during drivers parade ahead of the race. REUTERS/Edgar Su

A stewardess of Ukrainian International Airlines serves passengers during a flight from Kiev to Hurghada August 14, 2016. REUTERS/Gleb Garanich

Fred Cromer (L), President of Bombardier Commercial Aircraft and Lufthansa unit Swiss International Air Lines Chief Executive Thomas Kluehr (2nd L) listen to a stewardess aboard the airlines new Bombardier CS100 aircraft during a flight over the Swiss Alps, Switzerland July 6, 2016. REUTERS/Arnd Wiegmann

Passengers listen as a Philippine Airlines flight stewardess demonstrates safety measures to passengers before taking off at Marinduque airport in Gasan town , March 27, 2016. REUTERS/Erik De Castro

A Philippine Airlines flight stewardess demonstrates how to use a life jacket to passengers, before taking off at Marinduque airport in Gasan town, March 27, 2016. REUTERS/Erik De Castro

A Philippine Airlines flight stewardess demonstrates safety measures to passengers before taking off at Marinduque airport in Gasan town, March 27, 2016. REUTERS/Erik De Castro

(L-R) Air France-KLM stewardesses, Pieter Elbers, President and Chief Executive Officer of KLM, Air France-KLM Chief Executive Officer Alexandre de Juniac and Frederic Gagey, Chairman and Chief Executive Officer of Air France, pose before the company's 2015 annual results presentation in Paris, France, February 18, 2016. Franco-Dutch airline Air France-KLM beat forecasts with a return to profit last year, helped by a drop in the fuel bill and growth in passenger numbers, lifting its shares close to a nine-month high on Thursday. REUTERS/Charles Platiau

Pope Francis boards a plane at Fiumicino Airport in Rome November 25, 2015. Pope Francis steps onto African soil for the first time on Wednesday to address the continent's fast-growing Catholic congregation during a trip that will test his ability to bridge faultlines between Christians and Muslims. REUTERS/Giampiero Sposito

Qantas Group CEO Alan Joyce (2nd L) and Dinesh Keskar (2nd R), Senior Vice President, Asia Pacific and India Sales of Boeing Commercial Airplanes pose with Qantas stewardesses in period uniform in front of a Boeing 737-800 refurbished in a 1959 livery at an event marking the 95th anniversary of the airline at Sydney International Airport, November 16, 2015. REUTERS/Jason Reed

Qantas Group CEO Alan Joyce laughs alongside stewardesses in current (L) and retro (R) outfits during an event marking the 95th anniversary of the Australian airline at Sydney International Airport, November 16, 2015. REUTERS/Jason Reed

A stewardess holding a lightsabre poses for photos with visitors during a tour of the Star Wars themed All Nippon Airways ANA R2D2 Boeing 787 Dreamliner aircraft at Singapore's Changi Airport November 12, 2015. The aircraft was opened to the media on Thursday as it makes its first Asian stop outside Japan. REUTERS/Edgar Su

A woman poses inside the Trans World Airlines Flight Center at John F. Kennedy Airport in the Queens borough of New York, October 18, 2015. Thousands of visitors are expected at New York's John F. Kennedy Airport to get a last look at the iconic architecture of the Trans World Airlines Flight Center before the futuristic 1960s building is converted into a hotel. REUTERS/Shannon Stapleton

Formula One - F1 - Singapore Grand Prix 2015 - Marina Bay Street Circuit, Singapore - 19/9/15
Reuben Stone at the Paddock Club with Singapore Airlines stewardesses
SGP2015
Mandatory Credit: Singapore Grand Prix / Action Images via Reuters
Livepic

Singapore Airlines stewardesses sit on trishaws as they take part in a National Day Golden Jubilee parade rehearsal at the Padang in Singapore July 25, 2015. The city-state's 50th independence day falls on August 9. REUTERS/Edgar Su

Former Singapore Airlines stewardess Jenny Angie Fleming, 56, shows a photo of her standing next to the late first prime minister of Singapore Lee Kuan Yew and his late wife Kwa Geok Choo, after offering her tribute outside the Istana in Singapore March 24, 2015. Lee died on Monday aged 91, triggering a flood of tributes to the man who oversaw the tiny city-state's rapid rise from a British colonial backwater to a global trade and financial centre. REUTERS/Edgar Su

An Indigo Airlines' cabin crew member goes over safety guidelines during a flight from New Delhi to Srinagar city November 21, 2014. Picture taken November 21, 2014. REUTERS/Adnan Abidi (INDIA - Tags: BUSINESS TRANSPORT)

Prospective flight attendants practise restraining techniques during a self-defence course for crew members at the Indigo Airlines' Ifly training center in Gurgaon on the outskirts of New Delhi November 18, 2014. Picture taken November 18, 2014. REUTERS/Adnan Abidi (INDIA - Tags: BUSINESS TRANSPORT)

An instructor applies make-up foundation on the face of a prospective flight attendant during a training session at Indigo Airlines' Ifly training centre in Gurgaon on the outskirts of New Delhi November 18, 2014. Picture taken November 18, 2014. REUTERS/Adnan Abidi (INDIA - Tags: BUSINESS TRANSPORT)

An Etihad flight attendant is seen during a news conference at Malpensa Airport near Milan, October 20, 2014. Alitalia-Etihad announce today a partnership with Expo 2015 at the Milan's International airport Malpensa. REUTERS/Alessandro Garofalo (ITALY - Tags: BUSINESS TRANSPORT)

Singapore Airlines stewardesses, who will be appearing at the starting grid, gather ahead of the Singapore F1 Grand Prix at the Marina Bay street circuit in Singapore September 21, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT MOTORSPORT F1 TRANSPORT BUSINESS)

Singapore Airlines stewardesses, who will be appearing at the starting grid, stand together ahead of the Singapore F1 Grand Prix at the Marina Bay street circuit in Singapore September 21, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT MOTORSPORT F1 TRANSPORT BUSINESS)

Singapore Airlines stewardesses, who will be appearing at the starting grid, stand together ahead of the Singapore F1 Grand Prix at the Marina Bay street circuit in Singapore September 21, 2014. REUTERS/Edgar Su (SINGAPORE - Tags: SPORT MOTORSPORT F1 TRANSPORT BUSINESS)

A Lufhansa flight attendant walks across a pedestrian crossing during a strike at the Frankfurt airport, in Frankfurt September 5, 2014. Lufthansa was counting the cost of a second pilots' strike in a week on Friday, which forced the German airline to cancel just over 200 flights from Frankfurt airport, Europe's third largest hub. REUTERS/Ralph Orlowski (GERMANY - Tags: TRANSPORT BUSINESS EMPLOYMENT SOCIETY)