I'm in this same position with a cruise in October. Not sure if 14 year old granddaughter can go. Called RCCL 3 times on Saturday. First person said no problem, just no refund (except taxes and fees). 2nd person said we'd be charged an extra $2500 as they would have to rebook just me and my husband. 3rd time I called, we were told just to let her be a no show. Go figure.