You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me in booking a flight ticket from AUS to PHX?

ASSISTANT: Sure, can you please share your travel dates?

USER: I want to travel on 10/25, and return on 10/27.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your class preference?

USER: I prefer for business class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: I am Helen Evans.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.