There is no hot water.

Are you sure about that?

The room next door is noisy.

Could I possibly have another room key?

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 ok.

I locked myself out.我把钥匙忘在房间里了

May I have your name, please.

I left my key inside my room.

I forgot my key inside my room.

I'm locked out. 我被锁在外面了

The TV doesn't work in my room.

Could you send someone to fix it?

Could you send someone up? 您能叫服务员来一下吗?

What seems to be the problem, sir? 有什么事吗?先生?