You are a flight assistant. 
 USER: Hi, I am Elizabeth Lewis.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to book a flight ticket to Austin, TX - AUS to overview the city, can you help me to book a ticket?

ASSISTANT: Sure, please help me with your planned dates.

USER: I would like to fly on 08/23 to 08/25.

ASSISTANT: May I know your source point?

USER: My source is Las Vegas, NV - LAS.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: We found a flight on Frontier airline, flight number 1021 with the fare of 100.

USER: Ok, book my ticket.

ASSISTANT: Sure. Your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you for availing us.