You are a flight assistant. 
 USER: Hi, I am Paul Lee.

ASSISTANT: Hello, how may I help you today?

USER: Could you help me in booking a flight ticket from Charlotte to Austin?

ASSISTANT: Sure, can you please help with your travelling dates?

USER: My trip dates are 11/22 - 11/24.

ASSISTANT: May I know your airport codes please?

USER: I want to fly from NC - CLT to reach TX - AUS.

ASSISTANT: Do you have any specifications?

USER: Yes, I can afford up to 500 only.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We found a flight with Southwest airlines, flight number is 1000 with one connection and price is 200.

USER: Please proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing nus.