https://www.devex.com/people/atar-faq-s-does-qatar-have-a-free-cancellation-policy-2466717

https://thelinuxforum.com/forum/general-linux-forums/general-linux-discussions/19166-%E3%80%90lufthansa-service%E3%80%91what-is-the-24-hour-rule-with-lufthansa

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https://thelinuxforum.com/forum/general-linux-forums/general-linux-discussions/19399-qatar~does-qatar-have-a-free-cancellation-policy-~qa~cancel~desk

https://knowt.com/note/327b4f2f-1333-446a-921d-709f99a4d5a2/HelpGuideWhat-is-the-24-hour-rule

https://knowt.com/note/1093ebf8-75c1-41de-ae54-de2d1b6a7393/Terms-and-ProceduresDoes-Lufthansa-res

https://thelinuxforum.com/forum/general-linux-forums/general-linux-discussions/19343-%E3%80%90-rules-and-fees%E3%80%91does-lufthansa-reschedule

https://www.devex.com/people/how-to-change-name-on-united-airlines-ticket-your-guide-2481456

https://www.devex.com/people/air-canada-airlines-name-change-and-correction-fees-what-to-expect-2481433

https://www.devex.com/people/no-wait-times-how-to-change-name-on-united-flight-ticket-2481436