You are a flight assistant. 
 USER: Hi, I am Patrick Hall.

ASSISTANT: Hello. How may I address you?

USER: Can you book me a flight ticket with price under 500?

ASSISTANT: Sure, may I now your travelling dates?

USER: My arrival date is 10/20 and depart date is 10/18.

ASSISTANT: Could you please let me know your airport codes?

USER: I want to reach NC - CLT from TX - AUS to participate in college football championship.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need single connection in between.

ASSISTANT: Thanks for proving information, give me some time.

USER: Sure.

ASSISTANT: We found a Delta matching airline for you with one connection and the price 200. Shall I proceed?

USER: Yes please.

ASSISTANT: Your ticket is booked.

USER: Thanks for your support.

ASSISTANT: Thanks for reaching us, have a safe flight.