You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Please reserve me a flight ticket from JFK to SFO.

ASSISTANT: Sure, I am gleeful to help you with that. Can you please share your preferable travel dates?

USER: My travel dates are Sept 19 and Sept 21.

ASSISTANT: May I know your name please?

USER: I am Patricia Campbell.

ASSISTANT: Do you have any preferred timings for your journey?

USER: I would like to return beck in the afternoon time.

ASSISTANT: Can I know your connection limit?

USER: I prefer connecting flight for this trip.

ASSISTANT: Do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: Sorry to say that, there are no flights found on this route as per your travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.