You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: I am Samantha Wilson, I want to book a flight ticket to attend my Father's Retirement Celebrations in Austin, TX - AUS. Can you book a flight ticket with airfare 500?

ASSISTANT: Sure, can I know your source point?

USER: My origin is from San Francisco, CA - SFO.

ASSISTANT: May I know your travelling dates?

USER: My journey dates will be 08/05 - 08/07.

ASSISTANT: Please waiit.

USER: Sure.

ASSISTANT: We found a flight on AA airline, with the fare of 100, flight number 1000. Shall I book it?

USER: Ok, book it.

ASSISTANT: Your ticket has been reserved.

USER: Thanks.

ASSISTANT: Thank you for choosing us.