I booked a flight over the phone the other day and used PMUs to upgrade. I have confirmed fist class (G) for the flights. I noticed though that in between the flights at LAS there is only a 20min layover. I really don't think i'm going to make that and its the last flight of the day. I know they usually just book you on the next flight out but what happens with the PMU? Do I get a PMU reissued to me? Or is it gone forever? Or do they just rebook you into F? Thanks