Problem: Given the question: M: Thanks! I'm sure you did a good job, too. What was said before this conversation?
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The answer is:
W: I heard you got a full mark in your math exams. Congratulations!

Problem: Given the question: M: I am terribly sorry, madam. It's a bit unusually busy tonight. As a compensation, your meal will be free. What was said before this conversation?
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The answer is:
W: I have a complaint to make, Sir. I had waited ten minutes at the table before the waiter showed up, and I finally got served. And I found it was not what I ordered.

Problem: Given the question: M: In 40 minutes, at eleven o'clock. The plane for Berlin leaves every two hours. W: How much is a second class ticket, please? M: We have only first class tickets left. It is $ 350 one way. W: OK. I'd like one for the next flight. M: I'm sorry, but I don't sell tickets. You can get one from the machine over there. W: All right. By the way, what's the gate number? M: Four. Down the hall and to the left. W: Thanks a lot. What was said before this conversation?
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The answer is:
W: Excuse me, but could you tell me when the plane for Berlin leaves?