I recently booked 4 tickets on the same itinerary for my parents, my brother and me to fly on United from Chicago to Canada. During the booking process, I entered all our passport information. This was about 3 months ago, for a trip we are making next month. My mother recently changed her citizenship, so now she has a new passport and details. Will I be able to update our itinerary with her new passport information? I couldnt figure out how to do it on the United website, and I've been on hold for 45 mins on the phone, and at this point, ready to hang up. So basically looking to see if anyone has any idea if I can make the change, or if I have to cancel the ticket and buy it again for her. thanks in advance!!