You are a flight assistant. 
 USER: Hello, I am Andrew Scott.

ASSISTANT: Hello, How can I serve you?

USER: I am planing to give Bear party at Detroit to my friends, can you please book a ticket to DTW?

ASSISTANT: Sure. May I know your travelling dates?

USER: My depart is on 03/07 and return is on 03/09.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I need direct flight.

ASSISTANT: Let me know your source?

USER: Source code is Chicago, ORD.

ASSISTANT: We did not find any direct flight to ORD.

USER: No problem. Thank you.

ASSISTANT: Thanks for opting us.