You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Steven Clark here. Is this flight ticket booking agency?

ASSISTANT: Yes, tell me how can I help you?

USER: I want to visit Detroit for a business trip, so could you please help me out with booking?

ASSISTANT: Sure, may I know your airport codes?

USER: Sure, I want to travel from LAX to DTW.

ASSISTANT: On which dates you are willing to travel?

USER: I want to takeoff from Los Angles on 11/08 and after completion of my trip I would like to book a return flight also on 11/10.

ASSISTANT: Ok, please wait a minute. There is no flight.

USER: Oh, it's sad to hear. Anyways, thank you for the information.

ASSISTANT: Most welcome.