I am a cruise novice and I do not know all the booking policies. We are currently booked on thr Magic out of Miami on Feb 18. Party is 3 adults and 2 kids. Per TA suggestion, one room is 1 adult and 1 kid, and the other is two adults one kid. We are now thinking of adding my dad to the cruise. Online it looks like there is capacity. Could we move one of the adults to his reservation?