Problem: M: Yes, I'd like a bottle of juice. What was said before this conversation?

A: W: Can I help you?
Problem: Given the question: M: Sorry, but I can only give you change if you buy something. W: But I only have a dollar on me, and all I need is four quarters. M: Sorry, but I don't make the rules. What was said before this conversation?
++++++++++++++++++++++++++++++++
The answer is:
W: Excuse me. Can I have change for a dollar, please?
input question: W: Maybe there'll just be too many of them on the roads. The air will be so seriously polluted that nobody will be able to breathe. M: Exactly. People will have to rely on trains. W: Why do you say that? M: Well, we won't be able to use cars, and airports take up too much space. That leaves trains. W: Huh. So do you think there'll be more efficient train systems between cities? M: Sure. They'll enable people to travel between cities in a matter of hours. There may even be trains going under the oceans to connect the main continents. W: Under the oceans? Oh, no! I get nervous enough flying on a plane. What was said before this conversation????
output answer: M: The traffic is becoming worse and worse. I think there'll be huge changes in the ways people use cars. New laws will be made about what kind of car you can own and when you can drive.
F: Yes. I'd like this blue shirt. How much is it? What was said before this conversation?
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Answer: M: Can I help you, Madam?
Q: M: Good morning. I'd like to buy two tickets to New York, please. W: When do you want to leave, sir? M: Next Saturday. W: Just a moment. Yes, we still have some tickets. M: How much is a round trip ticket? W: Let me see ... 18,168 yuan. M: OK. I'd like two round trip tickets to New York. Here's my credit card. W: Thank you. May I have your name and passport number, sir? M: Michael Smith, passport number: P6363221 and Susan Smith, P6363220. W: Fine, and your phone number, please? M: 95396188. What was said before this conversation?
A: W: Good morning, sir.
[Q]: M: About 8 kilometers, but it doesn't seem very far, there is much traffic along this road. It's great to go by bike. What was said before this conversation?
****
[A]:
W: Do you live very far from your school?