第一句：Room service, please.

我要客房服务。

A:Room service, please.

我要客房服务。

B:What can I help you?

能为你做点什么?

A:Please change our sheets and pillow cases.

请换一下床单和枕套。

第二句：Please come to room No. 312.

请到312房间。

A:Room service. What can I do for you?

客房服务部，您需要什么服务?

B:Please come to room No. 312 and bring me bath towels.

请给312房间送几条浴巾来。

A:OK, we'll send a waiter soon.

好的，我们会马上派服务员过来。

B:Thank you.

谢谢!

知识延伸：

寻求旅店的客房服务或主动提供客房服务时还可以说：

Housekeeping, may I come in?

我是房客服务员，可以进来吗?

Room service. What can I do for you?

这是客房服务部，我能为你做点什么吗?