You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Nancy Roberts here, I want to book a direct flight to travel New York. Can you please help me to book a flight ticket?

ASSISTANT: Sure, kindly mention your travel dates?

USER: Yes, my travel dates are 08/07 and 08/09.

ASSISTANT: May I know your airport codes?

USER: Yes, my source code is AUS and destination code is LGA.

ASSISTANT: Sorry to say, no flight with your requirement.

USER: Not an issue, thank you for the information.

ASSISTANT: Thanks for reaching us, have a good day.