https://support.google.com/edu/classroom/thread/335199557?hl=en&sjid=11445308492238211481-NA

https://forum.dimensionengineering.com/topic/29959-lufthansa-airlines-customer-support-most-effective-ways-to-get-help/

https://forum.dimensionengineering.com/topic/29958-ways-to-reach-lufthansa-airlines-via-phone-email-and-live-chat-for-assistance/

https://www.goodreads.com/quotes/12706852-help–24-7-how-do-i-get-a-human-at-expedia

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https://www.goodreads.com/quotes/12706776-how-do-i-communicate-to-expedia-easy-ways-to

https://www.goodreads.com/quotes/12706776-how-do-i-communicate-to-expedia-easy-ways-to