https://www.devex.com/people/lufthansa_air-what-is-the-cancellation-policy-for-lufthansa-2391685
https://www.devex.com/people/servicio-al-cliente-como-llamar-a-aeromexico-desde-estados-unidos-2392998
https://www.devex.com/people/expedia-refund-policy-can-you-cancel-with-expedia-and-get-a-refund-2393009
https://community.freeconferencecall.com/t/ryan-faqs-does-ryanair-have-a-free-cancellation-period/3817
https://www.devex.com/people/updated-policy-info-does-qatar-have-a-free-cancellation-policy-2393058
