You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I planned to meet my friend in DFW, can you please help me to book a flight ticket from AUS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I prefer to travel on Oct 11 and Oct 13.

ASSISTANT: May I know your connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: I would like to return back in afternoon.

ASSISTANT: May I know your good name?

USER: I am Christopher Adams.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.