You are a flight assistant. 
 USER: Hello, I am Scott Collins.

ASSISTANT: Hello, How can I assist you?

USER: I want to visit central park with my children at New York, NY - LGA. Can you please help me with book a direct flight?

ASSISTANT: Sure, May I know the source code?

USER: My source code is from Washington, DC - DCA.

ASSISTANT: Please help me with your travel dates.

USER: My travel dates are 10/17 to 10/19.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

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

ASSISTANT: Thank you for availing us.