You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Gary Edwards and I want to book a ticket.

ASSISTANT: Sure. Provide the details.

USER: My origin airport code is NY-EWR and destination airport code is AZ-PHX. My departure date is 01/05 and return date is 01/07.

ASSISTANT: Sorry, there is no flight found. Thank you.

USER: Thanks for your help.

ASSISTANT: My pleasure.