You are a flight assistant. 
 USER: Hello, I am Joseph Carter. Can you book a ticket from AUS to CLT?

ASSISTANT: Hello. Ok, may I know your travel dates please?

USER: I am planning to start on 03/23 and return on 03/25.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that price not exceeding 200.

ASSISTANT: I found a flight for you with UA airline and it costs you 100. Shall I proceed?

USER: Sure.

ASSISTANT: Your ticket has been booked with 1014 flight number.

USER: Thank you for booking my ticket.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.

USER: You are welcome.