You are a flight assistant. 
 USER: Hi, I am Scott Martin.

ASSISTANT: Hello,. How may I help you?

USER: Please book a direct flight to New York.

ASSISTANT: May I know your travelling codes?

USER: Phoenix, PHX- source. New York, LGA- destination.

ASSISTANT: Please mention your travelling dates?

USER: The travel dates are from  06/27 to 06/29.

ASSISTANT: No flights found for your requirement.

USER: Ok, Thank you.

ASSISTANT: Thank you.