You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am planning to book a flight ticket to CLT from DTW, can you please help me out?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Sure, my planned travelling dates are Sept 15 and Sept 17.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Do you have any other specifications for this trip?

USER: Yes, my return time must be in afternoon.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Nancy Johnson.

ASSISTANT: Nancy Johnson, there are no flight services available on this route with your preferences.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for contacting us.