A、Room service. B、A morning call. C、Late check out. D、A room upgrade. B信息明示题。对话开头，女士询问男士需要什么帮助，男士说明天早上需要叫醒服务。由此可知，B)“叫醒服务”为本题的答案

W: Good afternoon, reception. How can I help you?
M: Good afternoon. I need a wake-up call tomorrow morning.
W:  No problem. When would you like the call?
M: At 6 o’clock.
W: We’ll get your wake-up call at 6 o’clock in the morning. Anything else, sir?
M: Yes. Could you organize a taxi for me at 7 o’clock tomorrow morning?
W: Sure. Where do you want the taxi to take you?
M: To the airport.
W: Okay, I will do it right away for you.
M: Thank you.
W: You’re welcome.