Why does the man want an early appointment?

M: I have to have an appointment first thing in the morning. The doctor wants to do me tests and
I mustn’t eat for twelve hours before that. I’m right, aren’t I?
W: Yes. She said the best way is to go without breakfast and come in early.
M: Yeah. Then I can have a snack and not miss too much time at work.

W: How’s college going?
M: Not very well, actually. I’ve got a bit of a problem with my timetable this term, I mean, the last thing I need is three lectures on a Friday. I wish they wouldn’t change the timetable every term.
W: Oh dear. I think last term was much better.