There is no hot water.
There is no hot water. (没有热水。)
Are you sure about that? (您肯定没有吗?)
The room next door is noisy.
Could I possibly have another room key? *因为有possibly，所以使得说法更礼貌。
Could I please have another room key?
May I have another room key?
Is it all right if I have another room key?
Would it be possible for me to have another room key?
I'd like to have another key, if that's okay. (如果可以的话，我想再要一把房间的钥匙。)
I locked myself out.
I locked myself out.(我把钥匙忘在房间里了。)
May I have your name, please. (请告诉我您叫什么名字?)
I left my key inside my room.
I forgot my key inside my room. (我把钥匙忘在屋里了。)
I'm locked out. 这与上一句的I locked myself out语气上有些不同。I locked myself out只表示自己把钥匙忘在房间里了，而I'm locked out还含有被别人锁在外面的意思。
The TV doesn't work in my room. *电视或房间里电器等设备坏了，不能使用时都可以用...doesn't work来表示。
Could you send someone to fix it? *用fix来表示“修理”。
Could you send someone up?
Could you send someone up? (您能叫一位服务员来一趟吗?)
What seems to be the problem, sir? (有什么事吗?先生?)