You are a flight assistant. 
 USER: Hi. I am David Harris.

ASSISTANT: Hello, how may I guide you today?

USER: Can you book a flight ticket from SFO to IAH?

ASSISTANT: Sure, please share you travelling dates.

USER: My planned dates are from 10/08 to 10/10.

ASSISTANT: Ok, may I know your budget?

USER: I can bare up to 5000.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for your time, we found a direct flight in Spirit airline. Can I proceed?

USER: Do not proceed.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for availing us.