You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: David Allen here.

ASSISTANT: How can I assist you?

USER: Can you please help me in booking the ticket from JFK to ORD? Sure, my travel dates are 06/13 and 06/15.

ASSISTANT: Ok, may I know your travelling dates? Ok, please wait.

USER: Sure, I'll wait.

ASSISTANT: Here is a flight with 1 connection limit and fare is 200.

USER: That's fine, please proceed for booking.

ASSISTANT: Your booking is done.

USER: Thank you so much.

ASSISTANT: Thank you.