"You can correct a name on your reserved American flight ticket through various methods such as,

Official website and navigate to the “Manage Trip” option.
Dial +1-888-272-2147 (OTA), the customer service number or flight experts at +1-888-272-2147 (OTA).
Remember that you can effortlessly request a minor name change on a American flight ticket. "

https://www.flightsrules.com/how-to-change-name-on-american-airlines-ticket/