what does free cancellation mean on expedia flights

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https://intercom.help/bhuahanbhatt-int/en/articles/10791201-how-do-i-get-a-human-at-expedia-instant-faq-expedia

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https://intercom.help/bhuahanbhatt-int/en/articles/10791174-how-do-i-avoid-expedia-cancellation-fees

https://support.google.com/edu/classroom/thread/331426025?hl=en&sjid=2462340102609435918-NA

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