You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you book a business class flight ticket for me?

ASSISTANT: Sure, I am here to help you out. May I know your travel dates please?

USER: I will fly on May 28 and return on May 30.

ASSISTANT: Can you please share your airport codes?

USER: My source point is PHL and destination is MSP.

ASSISTANT: Is there any connection preference?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is George Johnson.

ASSISTANT: George Johnson, there are no flights available in your route with your preferences.

USER: Ok thank you for the information.

ASSISTANT: Thank you for choosing us.