You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am looking to book a flight ticket from DFW to ATL. Can you help me for that?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are Sep 19 and Sep 21.

ASSISTANT: May I know your connection limit?

USER: I prefer to book a single connecting flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: My name is Patricia Campbell.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

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

ASSISTANT: Thank you for contacting us.