We have booked our first Viking Cruise. Venice, the Adriatic & Greece August 18, 2023. We booked a PV2 Penthouse Veranda, but didn't get assigned a room number. The booking says GTY. The booking says we many not find out our room until just before the trip. Does anyone know what normally happens? Right now there is very low availabiliy in PV2 & PV3, but more in PV1 according to the Viking Site.