You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Green. I want to book a flight ticket from ORD to DTW. Could you help me in booking?

ASSISTANT: Jack Green, I am willing to help you for this. When you are willing to leave?

USER: I want to start my journey on Feb 02 and I would like to return back on Feb 04.

ASSISTANT: Do you have any requirements?

USER: I need return flight in evening.

ASSISTANT: As per your data, no flights are found.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you very much for reaching us.