https://www.steadyhealth.com/topics/ways-to-call-american-airlines-customer-care-service-via-phone-full-methods-explained-step-by-step-12
https://support.google.com/android/thread/330480038?hl=en&sjid=9114218148227455975-NC support.google.com
https://support.google.com/edu/classroom/thread/330950014?hl=en&sjid=16515404143519848877-EU support.google.com
https://superuser.com/questions/1886101/answer-is-yeswhat-is-the-refundable-option-on-expedia superuser.com
https://superuser.com/questions/1886098/answer-is-yeswhat-is-the-fully-refundable-option-on-expedia superuser.com