You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Eric Jackson here. I want to attend a Marriage in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, can I know your travel dates?

USER: My travelling dates are 12/23 and 12/25.

ASSISTANT: Can you share your airport codes?

USER: My airport codes are JFK and IAD.

ASSISTANT: May I know the connection limit?

USER: I need single connecting flight.

ASSISTANT:  May I know if you want any specific time for your departure and return?

USER: I want to return on afternoon.

ASSISTANT:  Sorry to say that, there are no flights available on the routes of your journey.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.