You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me in reserving the ticket from DTW to DCA?

ASSISTANT: Please provide your trip dates.

USER: I am planning my trip on May 27 and again I will return back on May 29.

ASSISTANT: Do you need any connection limit?

USER: I am planning to travel in single connection flight.

ASSISTANT: Do you need any other specifications?

USER: No, I don't have any other specifications regarding my journey.

ASSISTANT: May I know your name?

USER: Myself Richard Collins.

ASSISTANT: There are no flights available on your routes.

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

ASSISTANT: Thank you for opting us.