You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I want to attend a Seminar in DCA. Can you please help me for booking the flight ticket from JFK?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are Mar 27 and Mar 29.

ASSISTANT: Do you need any specifications?

USER: I prefer single connecting flight.

ASSISTANT: Can I know your name please?

USER: Timothy Turner.

ASSISTANT: Sorry, there are no flights found.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.