Why was the woman kept waiting so long?

W: I’ve been waiting here for a good 20 minutes. Why did it take you so long to come back?
M: Oh, I’m sorry to have kept you sitting here so long. I had to drive two blocks before I finally found a place to park the car.
W: You can always find excuses for yourself.
M: Next time I will arrive 20 minutes earlier.

W: I only want to get a can of juice to my room.
M: You don’t have to wait in the food line for that. There’s a machine near that stack of trays.