You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: I'm Katherine Walker. I am planning to attend convocation meeting at Detroit, can you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your preferable dates to travel?

USER: Sure, I would like to take off on 07/25 and return back on 07/27.

ASSISTANT: Can you please share your source and destination airport codes?

USER: My source airport code is LGA and the destination airport code is DTW. Please make sure that the connection limit is 0.

ASSISTANT: Sorry, there is no flight available on your requested dates with 0 connection.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Most welcome.