Why is the woman calling?

Anwei! Thank you so much for helping set up for the party after last night’s theater performance. I couldn’t have done it without you, and the spicy dish you brought was delicious! You have got to tell me where you found the recipe! Everyone really liked it, and it didn’t look too complicated. Anyway, I guess I’ll see you Monday. I think we have rehearsal together for Elia Grande’s new play. I’m really excited to get started.
86.Why is the woman calling?
87.What does the woman imply when she says, "You have got to tell me where you found the recipe”?
88.Why is the woman looking forward to Monday?