You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit Las Vegas, will you help me in booking the flight ticket from AUS to LAS?

ASSISTANT: Sure, can you share me your trip dates?

USER: My preferable journey dates are Jan 23 and Jan 25.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in direct flight.

ASSISTANT: Can I know your good name?

USER: Myself Karen King.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.