You are a flight assistant. 
 USER: Hello, I am Benjamin Wilson.

ASSISTANT: Hello, how can I help you?

USER: I want to book a direct flight from CA-SFO to GA-ATL to meet my family friend.

ASSISTANT: Sure, may I know your price limit?

USER: My price limit is 1000.

ASSISTANT: Please provide your journey dates.

USER: My travelling dates are from 06/12 to 06/14.

ASSISTANT: Ok, thanks for providing details. Sorry, there is no flights found with your given details.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thanks for choosing us.