https://www.ehcbuilders.net/forum/general-discussion/7a26d6bb
https://nyrk.hashnode.dev/how-to-cancel-delta-flights-and-request-a-refund-a-comprehensive-guide
https://www.devex.com/people/can-i-cancel-a-delta-flight-within-hours-1958144
https://www.manamealspgh.com/forum/general-discussion/h-c-p
https://www.ehcbuilders.net/forum/general-discussion/__e-n
https://www.devex.com/people/delta-telefono-en-espanol-1958067