13. I needn't the room service from 5 p.m. to 10 a.m.
下午5点到上午10点我不需要客房服务。
还能这样说：
There is no need for room service from 5 p.m. to 10 a.m.
I don't order the room service from 5 p.m. to 10 a.m.
应用解析：
stand by service 备用;
take sb. into one's service 雇用某人;
attend service 参加礼拜;
take service with sb. 伺候某人
14. If you have something in need, please call us.
如果有什么需要，请打电话给我们。
还能这样说：
Let us know if we can be of any help.
If you need some help, please call us.
15. When can I do the turn-down service for you?
我什么时候为您收拾房间?
还能这样说：
When would you like me to tidy your room?
What time do you like me to clean your room?
16. Housekeeping, may I come in?
客房服务，我可以进来吗?
还能这样说：
It's time for the room service. Will you allow me to come in?
Room service, may I come in?
17. Please carefully fill out the registration form with your personal information.
请在登记表上仔细填写个人信息。
还能这样说：
Please be careful to fill out your personal information in the registration form.
Please write down your personal information carefully on the registration.