(Did a search, didn't find an answer)

Hi--Flying DEN to BOS tomorrow. Bought ticket yesterday, tried to u/g with miles. The second segment was waitlisted, so I called ICC this am to cancel the upgrade. They couldn't cancel the first segment b/c there were no seats in Y--is that right? (I'm guessing it is.) I asked to change the u/g instrument from miles to e500's and they said since there's no room in Y, I'd have to do that at the airport--does this sound right? Any other action I can take? Sure don't want to burn 15k on DEN to ORD. Thanks! Jay