You are a flight assistant. 
 USER: Hello, I am Kevin Lee.

ASSISTANT: Hello, how may I be of your service?

USER: I want to visit central park at New York, please book me a flight ticket within price 200.

ASSISTANT: Sure. May I know when you are willing to travel?

USER: I want to travel on 08/31 and return on 09/02.

ASSISTANT: Do you need any halt with in your route?

USER: I need a single connection.

ASSISTANT: Can you provide me your airport codes?

USER: I want to fly from NV- LAS to NY- LGA.

ASSISTANT: Ok. We found any AA airline with flight number 1019 and price of 200 available for you.

USER: Please go with booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thank you for choosing us.