You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to flight booking agency. How can I assist you today?

USER: I am planning to visit Austin, TX-AUS on 12/06 with my friends.Can you please help me for booking the flight ticket?

ASSISTANT: Sure, can you please share the source airport code and the departure date?

USER: The source code is from NV-LAS. The departure date is 12/06 and the return date is 12/08.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Laura Lewis.

ASSISTANT: Thank you for providing the details. Please allow me a moment to check for the availability of flight.

USER: Make sure that the price should not be more than 5000.

ASSISTANT: Ok. Laura, I am sorry to inform you that there is no flight available at your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.

ASSISTANT: You are welcome.