Was just "cruising" Carnival's web site and looked at the rates for the cruise I am sailing on next month. I noticed that the minimum inside category I booked is no longer available. I assume they are not taking any more bookings at the lower rates. Being that I booked on a guarantee looking for that upgrade what do my chances look like? I realize this is a silly question, but has anyone had any experiences they can share. The cruise is NOT sold out just the category I reserved.