I checked the message carefully before I did anything.
He’s since replied and it turns out he thought he was BCCing his travelling companion.
Discussion
Your being a nice person because I know you a bit, but its probably being a hook to a scam. I assume everything is scam nowadays, that the best way not to be scammed.
The key takeaway is a hotel in CZ is not your problem why? Because its nowhere near where you live just don't engage unless you know its for you.