https://stubhub.community/t5/Events-and-Venues/DA-1-866-672-8652-Delta-Airlines-Cancellation-Policy/m-p/257846#M109530
https://stubhub.community/t5/Events-and-Venues/DA-1-866-672-8652-Delta-Airlines-Cancellation-Policy/m-p/257846#M109530