为何这样来回答A:Thankyouforwhatyouhaved
A: Thank you for what you have done for me. B: Any time.
表示感谢可以说: Thank you a lot. I appreciate your help. Thank you for your help. It was nice of you to try. I appreciate. Thanks. Thank you very much. Thanks anyway. 不用谢可以说: You are welcome. My pleasure. Anytime. I'd really like to help. Don't mention it. It was nothing. 所以,对话中用“Any time”表示“不用谢”就不足为奇了。