https://www.devex.com/people/air-france-faq-is-air-france-open-on-24hr-2342271
https://www.devex.com/people/air-france-faq-is-air-france-open-on-24hrs-2342252
https://www.devex.com/people/air-france-open-is-air-france-open-on-24hr-2342284
https://www.devex.com/people/what-is-the-cancellation-policy-with-lufthansa-2342286