A:Excuse me,sir.I've made a tough decision and here is my resignation.

打扰一下，先生。我做了一个很困难的决定。这是我的辞呈。

B:I am sorry to hear that.Why do you want to quit?

我很遗憾听到这个决定。你为什么要辞职？

A:I'm sorry to bring up my resignation at  this moment.But I've decided to study abroad,

很抱歉在这个时候提出辞职。但是我已经决定要出国念书了。

B:All right.Welcome back anytime.

好吧。随时欢迎你回来。

A:Thank you,sir.I'd like to say that I've really enjoyed working with you.However,I think It's about time for me to leave.

谢谢，先生。我要说的是，我真的很高兴能与您公事。但是我觉得是我离开的时候了。

B:I am glad to work with you,too.Good luck.

我也很高兴与你公事。祝你好运。