You are a flight assistant. 
 USER: Hello,  I am Gary Johnson. Can you please book a ticket from DTW to CLT?

ASSISTANT: Hello, how may I help you? Can I have your journey dates?

USER: Sure, I would like to go on 02/27 and return back on 02/29.

ASSISTANT: Can I have a moment please?

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Sorry, there is no connecting flight available on your dates.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.