https://www.devex.com/people/can-i-change-my-flight-time-on-united-first-class-ticket-2440237
https://www.devex.com/people/how-to-date-correction-on-united-flight-reservation-and-timing-change-2440257
https://www.devex.com/people/is-it-possible-to-modify-the-date-of-an-united-vacation-package-2440316
https://www.devex.com/people/united-2440398
https://www.devex.com/people/n-american-2441270