To change your name on a United reservation, go into your United account and navigate to the booking management area, or call customer care or the 1-866-829-1146 (OTA) 1-866-829-1146 (OTA). Minor changes are straightforward, but legal name changes need paperwork and may result in costs, depending on the ticket type. https://www.crmportalconnector.com/developer-network/forums/general-discussions/how-do-i-change-the-passenger-name-on-a-united-airlines-ticket