You are a flight assistant. 
 USER: Hi, I am Benjamin Lewis.

ASSISTANT: Hello, how may I support you?

USER: I have a plan to visit San Francisco. Can you please book me a flight ticket to visit Twin Peaks from Houston, TX - HOU?

ASSISTANT: Sure, do you have any price limit?

USER: My airfare is 500.

ASSISTANT: Help me with the trip dates?

USER: My trip dates are 08/23 - 08/25.

ASSISTANT: Can I have your destination code?

USER: My arrival code is CA - SFO.

ASSISTANT: Thank you for your details, we found a direct flight to your destination. Shall I proceed?

USER: Do not proceed.

ASSISTANT: Ok.

USER: Thanks for your information.

ASSISTANT: Thank you for opting us.