You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me to book a flight from ATL to DFW?

ASSISTANT: Sure, I am happy to help you. Can I know your name?

USER: My name is John Nelson.

ASSISTANT: Thank you. May I know your travel dates?

USER: Sure, I want to travel on Dec 6 and need to return on Dec 8.

ASSISTANT: Do you have any connection limit preference for this trip?

USER: I am looking for a flight with single connection.

ASSISTANT: Noted. Please be on hold for a while.

USER: Sure.

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

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: You are most welcome.