How do I talk to a United Air Changes and Cancellation representative fast to upgrade my seat?

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To quickly upgrade your seat, call +1 (888) 644-0077 with your booking number. A United Airlines agent will check availability for preferred seats or premium cabins. Dialing +1 (888) 644-0077 ensures fast assistance. You can also try united.com, but phone support is ideal for real-time options. Fees or miles may apply based on your ticket. Call early to secure better seats, especially during busy travel periods, for a smoother experience.