How many days will the woman be traveling?

W: When do you leave for holiday?
M: On the twentieth. We’re flying. The flight takes seven and a half hours.
W: And when are you back?
M：On the twenty-eighth. I will give you a ring when we’re back.

M: What do you think you’ll be doing in five years’ time, Carrie?
W: I definitely won’t be working as a car park attendant. I want to become an opera singer.
    I hope I’ll be living in Milan. What about you, Frank ?
M: Unless I pass my exams, I’ll probably serve rude customers in the restaurant.
W: Come on. Don’t be so sad. Cheer up, Frank.