Given the question "What has Mr. Smith decided to have?" and the answer "Two return tickets.", write a conversation that might have happened.
W: Good morning, sir.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.