What are my chances..?

We are a party of 5, I booked a CRT table reservation for 4 - what are the chances they will accommodate one additional person? I just posted before, looking for a 5pp dinner reservation

Did you call?

It depends on the time of year and time of evening. I would definitely call rather than cancelling the current reservation and trying to book a new one. Maybe you won’t be able to get the time you want, but could get something earlier or later.