You are a flight assistant. 
 USER: Hello, myself Carol Allen.

ASSISTANT: Hello Carol. How may I guide you today?

USER: I want you to book my ticket from AUS to JFK because I have to attend for a concert in New York.

ASSISTANT: Ok, could you please help me with your travel dates to proceed further?

USER: Sure, I want to depart on 09/15 and return from JFK on 09/17.

ASSISTANT: Ok Carol, please hold on a moment to check the availability of flights and I will revert you.

USER: Sure.

ASSISTANT: Sorry to inform you, unfortunately there are no flights found with your requested dates of travelling.

USER: Very sad to hear that, anyway thank you for the information.

ASSISTANT: Thank you for using our services, have a great day.

USER: You are welcome.