You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning this vacation to visit Washington. Can you please help me in reserving the ticket from DTW to DCA?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: I am willing to travel on Dec 2 and again I will be return back on Dec 4.

ASSISTANT: Do you have any other specifications?

USER: My depart time is morning.

ASSISTANT: Give me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

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

ASSISTANT: Can I know your name?

USER: Myself Jonathan Brown.

ASSISTANT: Thank you for contacting us.