What is the purpose of the call?

M: Hi, you have reached the front desk of Cozy Hotel. How may I help you?
W: I’m interested in booking a room for next Friday. Are there any with an ocean view available?
M: I will check for you. Yes, it looks like there’s one available on the ninth floor. How many nights do you plan to stay? We are offering a promotion right now. If you stay at least three nights you’ll receive a free breakfast or lunch at our restaurant.
W: That sounds like a great deal, but I’ll only need two nights from Friday to Sunday. Thanks, anyway.