https://www.devex.com/people/does-qatar-airways-allow-date-change-call_now-2434497
https://www.devex.com/people/does-qatar-have-a-free-cancellation-policy-faqs-about-2434381
https://www.devex.com/people/can-you-change-the-date-of-your-flight-with-qatar-airways-2431073
https://www.devex.com/people/does-qatar-have-a-free-cancellation-policy-2430737