How long is man’s presentation expected to last?

W: Hi, John. You are supposed to make a speech this afternoon, right? Are you ready for that?
M: Yes,(50)I’ve got two hours for my presentation, but there’s a problem. I set up the overhead projector and prepared everything,(51)but the room is not very spacious. There will be 30 people, but only 25 people can be seated.
W:(52)Why don’t you call Janet and see if she can find another room for you?