You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Please book a ticket from New York, NY-LGA to Los Angeles, CA-LAX.

ASSISTANT: Sure, may I know your travelling dates?\.

USER: Travelling dates are from 03/01 to 03/03.

ASSISTANT: May I know your name to proceed further?

USER: My name is Gary Parker.

ASSISTANT: Sorry, I could not find any flight with your travelling dates.

USER: Thanks.

ASSISTANT: My pleasure.