● 还礼

不客气。
You're welcome.
Thank you for everything. (感谢您做的一切。)
You're welcome. (不客气。)
My pleasure.
Don't mention it.
No problem.
Not at all.
You're quite welcome.
That's quite alright.
Don't worry about it.

不必客气。
Don't mention it. *这句常用于美国，在英国和澳大利亚则不常使用。

能帮助您，我非常高兴。
I'm glad I could help.
Thanks, you saved my life! (谢谢您救了我一命。)
I'm glad I could help. (能帮助您，我非常高兴。)