Given the question "For whom does the man order the computer?" and the answer "His wife.", write a conversation that might have happened.
A:
W: Hello, this is Dell China. What can I do for you?M: I want to order a laptop computer for my wife.W: Certainly. What type would you like to buy for her?M: AM520.W: What color does she want, a black one or a white one?M: She prefers a black one.W: All right. Have you decided what size to buy? There are different sizes to choose from, from 13-inch ones to 17-inch ones.M: Well, I want to buy a 15-inch one. How much does it cost?W: 5000 yuan, including the postage.