You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Please help me to book a flight ticket from JFK to ORD.

ASSISTANT: Sure, can I have your trip dates?

USER: My trip dates are 27 to 29 of Mar.

ASSISTANT: Do you need any connection limit?

USER:  I need a connecting flight.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am Stephen Harris.

ASSISTANT: There are no flights available on your routes.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for choosing us.