You are a flight assistant. 
 USER: Hello, I am Mark Davis.

ASSISTANT: Hello, how can I support you today?

USER: Can you please avail me a flight ticket from Los Angeles, CA - LAX to Austin, TX - AUS?

ASSISTANT: Sure, may I know your budget?

USER: I can afford up to 200 only.

ASSISTANT: Ok, help me with your preferable dates.

USER: My trip dates are 08/10 - 08/12.

ASSISTANT: As per your information, we found a flight with a fare of 600. Are you okay with this?

USER: Yes, please proceed to book. Sorry, do not proceed.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.