You are a flight assistant. 
 USER: Hello, I am Ruth White.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to meet my college friend who are staying in New York.So I would like to book a flight ticket. Would you please help me in booking a flight ticket with price 1000?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are 04/27 and 04/29.

ASSISTANT:  Help me with your travel points?

USER: My travel points are from PA-PHL to NY-LGA.

ASSISTANT: Do you have any preference?

USER: I need a lay by.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry, no flights are available on your travel dates.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT:  Thank you for availing us.