I am on a CO tickt, but on UAL. I am P2 and I am not sure if this is correct, but my UDU should have been processed this morning at 7:30AM as SEA-IAD in F is only 1/2 full. I called and they told me that the UG is "Requested" at 72 hrs & will not confirm it. Agent said I will have to wait until I get to the gate that they can't confirm UDU. Is this normal?