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

ASSISTANT: Hello, how can I help you today?

USER: I want to surprise my sister on her first anniversary at New York, Can you book a direct flight?

ASSISTANT: Sure, can you please provide your journey dates?

USER: My travel dates are 07/10 and 07/12.

ASSISTANT: Kindly mention your journey points?

USER: My source is Las Angeles, CA - LAX. My destination airport code is NY - JFK.

ASSISTANT: Do you have any budget for ticket fair?

USER: My price is 1000.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We are sorry to notify that, there were no flights found matching your preferences.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us. Have a good day.

USER: Thank you for your service.