You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Brandon Lee, can you help me to book a flight with 200 price limit?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are 08/29 and 08/31.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: My preferred airport codes are ATL and AUS.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight with price 100 and the connections 1 is available.

USER: Yes, proceed with booking.

ASSISTANT: Your ticket is booked. The flight number is 1004 and the airline is Frontier.

USER: Thank you.

ASSISTANT: Welcome, have a great day.