Just a note - I have contacted the hotel twice when people have posted a cancellation. Unless you offer to transfer your reservation to someone, the hotel will not show that as an open room and there is no way for those of us who want it to book it.
So if you find that you are going to cancel a room, maybe a quick scan through the recent posts towards the end of the thread will help you find someone who might want it... and then a transfer of reservation could take place.
Cheers.