Respuesta de Jin:
He originally booked 2 separate days, Oct 11th and Oct 14th (leaving the 12th and 13th open). Not sure if he did this on purpose or if he booked it incorrectly.
At the last minute, he wanted to change his accommodation to the 12th-14th. Unfortunately someone else already instantly booked the 12th and 13th, so I told him I can let him stay in another spare room I have (without charge since he didn't show up on the 11th). He agreed, but when he arrived on the 12th and found out the room was on the basement level (it's a finished basement with it's own separate bathroom and has 2 windows), he went crazy and demanded to stay in the original room that he booked. Of course I couldn't do this because someone else already booked it. I tried to work with him, but he was combative and unwilling to be reasonable.