Why is the woman in London?

M: Are you staying long?
W: No, unfortunately only a couple of weeks.
M: On business or on holiday?
W: Business, I ’ m afraid. My company is setting up an office in London.

W: I was almost fooled by a telephone call yesterday.
M: What’s it about?
W: A week’ s vacation for two. But I realized it was a cheat when they told me to ring a special telephone number to claim the price.
M: Well, those calls are charged at unbelievably high rates.