https://www.devex.com/people/qatar-official-cancellation-guide-does-qatar-have-a-free-cancellation-policy-2444424
https://www.devex.com/people/faq-latest-guide-what-is-the-24-hour-rule-for-klm-2444443
https://www.devex.com/people/expedia-refund-info-is-expedia-really-free-cancellation-2444492
