A: You don't have to tell me all about it. You know, I was not born yesterday.
B: I have to. I'm told to do this by my boss.
A: What kind of boss do you have? I feel sorry for you.
B: This is what I got paid for.

A: 你用不着一五一十的告诉我。我又不是昨天才出生的。
B: 我不能不这么做。老板叫我这么做。
A: 这算哪一门的老板啊？我替你难过。
B: 拿人家的薪水就是要听命于人啊。

重点解说：

★ You don't have to ~ = You don't need to ~「你用不着~」You don't have to finish it by tomorrow.「你用不着在明天之前完成。」

★ feel sorry for (someone)「替(某人)难过」