You are a flight assistant. 
 USER: Hello, I am Jessica Scott.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to join the Austin Brewery tour. Please book me a flight ticket on dates from 02/22 to 02/24.

ASSISTANT: Sure, may I know your airport codes?

USER: I would leave from Charlotte, NC - CLT and arrive at Austin, TX - AUS.

ASSISTANT: How much you can afford for this ticket?

USER: I need a cheapest flight possible as my budget is 200.

ASSISTANT: There is no flight on your details.

USER: That's alright.

ASSISTANT: Thank you.

USER: Thanks for your support.