United States
https://www.entmasterclass.com/forum/general-discussion/r-let-s-know-what-is-the-cancellation-policy-for-united-airlines
https://www.entmasterclass.com/forum/general-discussion/0231e4e9
https://www.entmasterclass.com/forum/general-discussion/h-i-g-y-ib-ri-r-g-n-i-2
https://www.entmasterclass.com/forum/general-discussion/aa-american-e-ticket