You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a round trip from Austin to narrate a story to an actor, can you help me to book a flight ticket within the fare limit 500?

ASSISTANT: Sure, may I know your airport code?

USER: I need to leave from Austin, TX-AUS.

ASSISTANT: To proceed booking I need your travelling dates.

USER: 12/22 and 12/24 are my planned travelling dates.

ASSISTANT: Please provide your name.

USER: I am Jessica King.

ASSISTANT: Thanks for waiting, there is a flight with airline: Spirit, flight number:1019, price 200, 1 connection. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for your assistance.

ASSISTANT: Thank you.