Who is the woman looking for?

16.
W: Have you seen Alice?
M: I saw her about 10 minutes ago. She was having lunch with Mike and Helen.
   17.
M: Let’ s go to watch the play tonight.
W: But a friend of mine will come to see me.
   18.
W: Can you show me the way to the fruit shop, please?
M: Sorry, I don’t know. But you can ask the old man over there.
   19.
W: Before going to the airport, I need to meet Jane at the railway station.
M: Don’t worry, I can drive you there. It’ s not far away from my home.
   20.
W: I’m afraid I must go now. Thank you for the dinner.
M: I’m glad you liked it. Come over again when you have time.