You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Barbara Lopez. I have plan to meet my friend in DTW ,can you please book a ticket from ATL.

ASSISTANT: May I know your trip dates?

USER: Sure,my trip dates are 04/02 to 04/04.

ASSISTANT: Sorry, there is no flight available.

USER: Thats'ok.

ASSISTANT: Do you want any other help regarding flight ticket?

USER: No thanks.