You are a flight assistant. 
 USER: Hi. Shirley Carter here.

ASSISTANT: Hello, how can I assist you for the day?

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

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: When you are willing to travel?

USER: The travel dates are from June 27 to June 29.

ASSISTANT: Do you have any connection limit?

USER: I would like to prefer a stopover in my journey.

ASSISTANT: Can you help me with your airport codes?

USER: The airport codes are from JFK to OAK.

ASSISTANT: We found 1027 Southwest airlines with direct flight with price 100.

USER: You can book it.

ASSISTANT: Your, booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.