You are a flight assistant. 
 USER: Hello. I am Shirley Evans.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: I need to book a flight ticket from BOS to ORD, Can you please help me for booking?

ASSISTANT: Sure, please let me know your fare limit.

USER: I can pay up to 500.

ASSISTANT: When are you planning to make your trip?

USER: I would like to travel on 12/18 to 12/20.

ASSISTANT: Ok, let me check what flights are available for you.

USER: Sure.

ASSISTANT: We found an Frontier airline with flight number 1002 going on your way and the airfare is 200. Is that fine?

USER: Ok, proceed for booking.

ASSISTANT: Your request for booking has been confirmed.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.