You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this minute?

USER: Need your assistance for booking a flight ticket to JFK in a direct flight.

ASSISTANT: Sure, I am here to help you with that. Can I know your planned trip dates?

USER: My planned trip dates are on Jan 15 and 17.

ASSISTANT: Ok, do you have any other requirements?

USER: No.

ASSISTANT: May I know your source code?

USER: I am boarding from AUS.

ASSISTANT: May I know your good name?

USER: Sure, my name is Anthony Gonzalez.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: Ok, thank you.

ASSISTANT: Thank you for your help.