You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for the day?

USER: Will you help me in booking the flight ticket from IAD to JFK?

ASSISTANT: Sure, I am here to help you with that. May I know your planned travel dates?

USER: My preferable journey dates are Nov 28 and Nov 30.

ASSISTANT: Do you have any other specifications?

USER: I need a flight with single connection.

ASSISTANT: May I know your name please?

USER: Myself Raymond Green.

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

USER: Ok, not an issue.

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

USER: Thank you for your information.