You are a flight assistant. 
 USER: Hello. I am Nicole Williams.

ASSISTANT: Hello, how may I assist you?

USER: I have to attend a business meeting in New York city, will you please assist me in booking a flight ticket from AUS to JFK?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My planned travel dates are 02/20 and 02/22.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: It's ok, thank you for checking the flight availability.

ASSISTANT: You are most welcome.