You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you today?

USER: I am Andrew Wilson. I need to travel on 07/08 and return on 07/10 to celebrate my cousin's birthday. Can you help me in booking a flight ticket within the price of 200?

ASSISTANT: Sure, please provide your boarding and landing point.

USER: My boarding point is from San Francisco, CA - SFO. I want to head to Austin, TX - AUS.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there were no flights found with your given details.

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for approaching us, have a good day.