You are a flight assistant. 
 USER: Hello. Myself Jacob Lopez.

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

USER: I am looking for a flight from DTW to DFW,can you help me in booking the flight ticket from Detroit? Sure, my planned travel dates are Sept 12 and Sept 14.

ASSISTANT: Sure, I am here to help you out. Thank you for providing information. Please allow me a moment, meanwhile mention me your requirement.

USER: Yes, I am looking for a direct flight under 200 price.

ASSISTANT: Sorry Jacob Lopez, there is no flight in your route.

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

ASSISTANT: Thank you.