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

ASSISTANT: Hello. How can I assist you today?

USER: I ma planning to go for Brooklyn Walking tour with my friends at New York, JFK.

ASSISTANT: Ok.

USER: So, I need your assistance in booking a plane ticket with fare 1000.

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: Let me know your travelling dates to check the flights for you.

USER: I planned this trip to be in between 01/14 and 01/16.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a lay by in between my journey.

ASSISTANT: May I know your source code?

USER: Las Vegas, LAS is my take off airport code.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there were no flights found on your route.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.