I booked SFO(6/19/04 flt 0822)-ANC r/t back in Nov. 03 on awared travel, and now I was told the schedule is changed to depart 3 hours later from the previous published schedule. I have the question

1) If I can change to another departure flight without paying extra?

2) Does UA has to put me into an earlier flight upon my request?

3) If I can cancel the booking and get my miles back to my MP account and my security fee back without extra charge.

Thanks,