You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your good name?

USER: I am Margaret Green.

ASSISTANT: How can I assist you?

USER: I would like to go for Brooklyn Walking tour at New York on 06/28.So I want to travel on 06/27 and return on 06/29.

ASSISTANT: Ok.

USER: Can you help me in booking flight ticket from Los Angeles?

ASSISTANT: Sure, we are here to help you. May I know your destination airport code?

USER: Yes, it is NY-JFK.

ASSISTANT: Kindly, mention your source airport code.

USER: Ok, my source code is CA-LAX.

ASSISTANT: Do you have any price limit?

USER: Yes, I need a ticket with in price 5000.

ASSISTANT: Thank you for providing your details, wait for a while.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry to inform, no flights found to JFK.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us, have a nice day.