For how many nights will the man stay at the hotel?

W: Hello, sir, how can I be of service to you today?
M: Hi, my name is John Smith, and I am here to check in. I made a reservation for a single room for two nights three days ago.(68)
W: Ah... yes, Mr. Smith. We’ve been expecting you. I can see here that you requested a non-smoking room overlooking Lake Huron. You’ve also asked for your breakfast meal to be served in your room at 7 a.m. sharp, right?(69)
M: Yes, that is correct. I have to make a presentation at a business seminar at 9,(70)so I want to have some time to read over the materials beforehand.