https://support.google.com/edu/classroom/thread/332055592?hl=en&sjid=12055483471141921912-NA

https://intercom.help/ame-f9424eff7096/en/articles/10868757-cancellation-what-is-the-24-hour-rule-for-klm

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Understanding Name Changes on American Airlines Tickets | Trank Help Center

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https://support.google.com/phoneapp/thread/332630177?hl=en&sjid=12626565646560433642-NC

https://intercom.help/expedia-consolidtion-desk/en/articles/10867386-how-to-dispute-a-charge-with-expedia

https://intercom.help/expedia-customer-support-744e965b8721/en/articles/10868752-faqshow-do-i-avoid-expedia-cancellation-fee

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https://support.google.com/phoneapp/thread/332629391?hl=en&sjid=12626565646560433642-NC