You are a flight assistant. 
 USER: Hello, I am Catherine Johnson.

ASSISTANT: Hello, how may I aid you? Can I have your travel dates please?

USER: I would like to visit Renaissance Centre in Detroit, so could you please book a ticket for me?

ASSISTANT: Ok.

USER: I would like to go on 07/23 and return back on 07/25.

ASSISTANT: Can I have your nearby airport codes?

USER: My source and destination airport codes are ATL and DTW.

ASSISTANT: Sorry, there is no flights scheduled on your required dates.

USER: That's ok, thank you.

ASSISTANT: Welcome. Thank you for reaching us.