Given the question "How much did the woman pay when she first rented a house?" and the answer "600 yuan a month.", write a conversation that might have happened.
A:
M: Welcome to Beijing, Mary. This time you will see the New Beijing.W: Thank you indeed.M: Is everything settled?W: Almost.M: What else can I do for you?W: I suppose I should look for a bigger house. But I don't see how I can afford one right now.M: If only you hadn't spent so much money on your vacation!W: You're right. But I really had a happy vacation.M: OK, Maybe you can move into Kelly's house and share that with her for a couple of months.W: Thank you. But I don't want to bother you too much.M: No trouble at all.W: How much should I pay for the rent?M: About 400 yuan a month.W: Great. That's one-third less than it was when I first rented a house.