https://intercom.help/travelnamechange/en/articles/10781657-making-way-for-name-changes-on-united-airlines-tickets
https://pressbooks.pub/ushistory1/chapter/name-change-rules-for-united-airlines-ticket-holders/
http://pressbooks.pub/travellingguide/chapter/name-change-required-on-united-ticket-quick-guide-to-name-update/
https://pressbooks.pub/namechangestudies/chapter/united-airlines-essentials-the-hassle-free-way-to-name-change-on-united-ticket-2/
https://pressbooks.pub/editname/chapter/united-airlines-name-change-what-you-need-to-know-before-you-fly/