You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Larry Brown.

ASSISTANT: How shall I help you?

USER: I want to celebrate my friend birthday at Chicago, IL - ORD. Can you please help me with book a ticket from New York, NY - LGA?

ASSISTANT: Please mention your travelling dates?

USER: My scheduled dates are 02/29 to 03/02.

ASSISTANT: Please specify connections limit?

USER: I need a connecting flight and price limit is 500.

ASSISTANT: No flights found.

USER: OK, not an issue.

ASSISTANT: Thanks.