客人对我说谢谢，我该怎么用英文回答他

Answer 1

不用谢.
You're welcome.
不用谢.
You are welcome.
不用谢.
It was my pleasure.
不用谢.
Thanks a lot.Don't mention it.
不用谢.
Thank you.Not at all.
不用谢.
Thank you.You are welcome.
那没什么,不用谢.
That's all right,you're welcome.
算不了什么,不用谢
Forget it

Answer 2

My pleasure.