You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please share your journey dates?

USER: Thank you. My preferred journey dates are Aug 16 and Aug 18.

ASSISTANT: Do you have any specifications?

USER: I am willing to travel in a business class flight.

ASSISTANT: May I know your good name please?

USER: My name is Karen Adams.

ASSISTANT: Please wait for a while.

USER: Ok, please make sure that the connection limit is 1.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: It's ok, not a problem with that. Thank you for searching the flight.

ASSISTANT: Thank you for choosing us.