You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Please book me a flight ticket from JFK to IAD to meet my family.

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: I have planned to travel on Nov 16th and return on Nov 18th.

ASSISTANT: Can you please share your connection limit?

USER: I prefer connecting flight.

ASSISTANT: Can you please let me know your name for booking purpose?

USER: John Jones.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: John Jones, there are no flights available in your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.