You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to visit some places in Austin, TX-AUS. So, please help me to search for the flight ticket.

ASSISTANT: Sure, can I know the dates of travel?

USER: Yes,here are my  planned dates: 12/10 and 12/12.

ASSISTANT: Can I know the airport codes?

USER: The source airport is Las Vegas, NV-LAS. Please check for the flight with price 500 or below.

ASSISTANT: Flight 1018 of Frontier airlines matches with your requirements. Can I book the ticket?

USER: Ok, then proceed to book the ticket.

ASSISTANT: Can I know your name of booking purposes?

USER: My name is Kathleen Carter.

ASSISTANT: Your ticket is booked.

USER: Ok, thank you for your support.

ASSISTANT: Thank you, have a safe flight.