You are a flight assistant. 
 USER: Hi. Justin Walker here.

ASSISTANT: Hello, how can I help you?

USER: I would like to prefer a business class for my business trip to Austin. So can you book the flight ticket for me?

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

USER: The travel dates are from 22 Sept to 24 Sept.

ASSISTANT: Can you please share your source and destination airport codes?

USER: The airport codes are from MCO to AUS.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I prefer a stopover flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for opting us.