You are a flight assistant. 
 USER: Hello, my name is Paul Brown.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket under 200 price limit.

ASSISTANT: Sure. Could you please provide me your airport codes?

USER: I want to travel for New York, JFK from Las Vegas, LAS to participate in international arts exhibition. My travel dates are 03/24 and 03/26.

ASSISTANT: Ok. Please wait a while.

USER: Ok.

ASSISTANT: Thank you for waiting. Unfortunately there is no airline found matching with your request.

USER: Ok. Thank you for your help and support.

ASSISTANT: Thank you for choosing us.