You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Myself Nicholas Davis. I need to schedule my trip to travel Washington. Can you please help me in reserving the ticket from SEA to DCA?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: I am planning my trip on Feb 14, and again I will return back on Feb 16.

ASSISTANT: Do you have any requirement?

USER: My depart time is afternoon.

ASSISTANT: Do you have connection limit?

USER: I am flexible with single connection.

ASSISTANT: Sorry  Nicholas Davis, there is no flight in your route.

USER: Not a big deal, anyhow thank you very much for your service.

ASSISTANT: Thank you for reaching us.