You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to travel from PHX to MSP. Can you help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: I want to fly in the flight on Jan 21 and Jan 23.

ASSISTANT: Do you have any connection limit preference?

USER: I am looking for a direct flight.

ASSISTANT: Do you have any class preference?

USER: I prefer to travel in business class.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

ASSISTANT: May I know your good name please?

USER: Katherine Evans.

ASSISTANT: Katherine Evans, there are no flight services are available on this route with your preferences.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.