Anything is possible, but I doubt someone would cancel this close, unless it was same day because of a missed flight (which happens quite a bit)
if this happens, obviously, you wouldn’t be able to book it online you would have to rely on the bid system, so push that last minute bid up high and you may get lucky.
I'm on the escape this coming Saturday so if that’s the cruise your on, hope to see you in the Haven with us 😉