You can’t change the name on an American Airlines ticket to a different person, but minor corrections, such as fixing misspellings, are allowed. For significant....
https://www.devex.com/people/can-you-change-a-name-on-american-airlines-ticket-2087034

Delta Airlines allows minor name corrections for tickets, typically up to three characters, without a fee. For more extensive changes due to legal name changes....
https://support.cgu.edu/hc/en-us/community/posts/32092273443348--A-A-Name-Change-Delta-airlines-name-change

American Airlines allows free cancellations within 24 hours of booking for tickets booked at least two days in advance. Afterward, cancellation fees depend on the....
https://www.devex.com/people/what-is-the-american-airlines-cancellation-policy-2086508