You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a connecting flight ticket?

ASSISTANT: Sure, May I know the planned travel dates?

USER: My travel dates are July 26 and July 28.

ASSISTANT: Let me know the genesis and terminus airport codes.

USER: My airport codes are JFK and ORD.

ASSISTANT: Is there any specific class preference?

USER: No.

ASSISTANT: May I know if you have any airline preference?

USER: I am comfortable with any airlines.

ASSISTANT: Let me know if you have any more preferences?

USER: I would like to return back in the evening time.

ASSISTANT: May I know your name please.

USER: I am Kathleen Hill.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Kathleen Hill. I regret ti inform that there are no flights on your route with the given dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.