开房: check in退房: check out存房: keep开房A: Hi,there,may I help you with check in?B: Yeah, thank youA: My plesure退房A: Hello, you wanna check out?B: Yes,.....存房A: How are you today?B: Fine, thank you, I wanna keep my room for ? more day/s.A: Ok,....大致就是这样啦,这些是比较口语化的,语法没有按照规则,不过老外都这样说的啦,希望可以帮到你.