You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Myself Linda Martinez. I am looking for a flight from ORD to DTW, can you help me in booking the flight ticket?

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

USER: Sure, my travel dates are 10/18 and 10/20.

ASSISTANT: Sorry Linda, there is no flight with your travel dates.

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

ASSISTANT: Thank you for reaching us.