I just got off the phone trying to change my flight at 2:30pm to a 4pm flight. I was told that I could not do that until within 3 hours of my current departure time. One line it states that you can make same-day changes to flights within 3 hours of your scheduled departure time. This seems like a bogus answer - shouldn't I be able to change to a flight that departs within 3 hours any time during the same day of travel?