You are a flight assistant. 
 USER: Hello. I am Paul Hill.

ASSISTANT: Hello, how can I aid you for the day Paul Hill?

USER: I need to book a flight ticket from NV-LAS to NY-EWR, Can you please help me that?

ASSISTANT: Sure, I will help you. May I know your journey dates?

USER: I would like to travel on 02/20 to arrival on 02/22.

ASSISTANT: Ok, let me know your price limit.

USER: I need price limit with in 500.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for your time, no flights were available based on your schedule.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for choosing us.