You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am planning to visit a Lady Bird Lake in Austin, so please book a flight ticket from PHX to AUS.

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

USER: I want to fly on May 19, return on May 21.

ASSISTANT: Do you have any connection limit?

USER: I want a flight with one connection.

ASSISTANT: Do you have any other requirements?

USER: I want business class flight ticket.

ASSISTANT: May I know your name to proceed further?

USER: My name is Amy White.

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

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.