You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me in booking a flight ticket from Phoenix, PHX to reach San Francisco, SFO?

ASSISTANT: Sure, May I know the journey dates?

USER: My journey dates are from Nov 23 to Nov 25.

ASSISTANT: Do you have any connection limit?

USER: I need a way station in between journey.

ASSISTANT: Do you have any airline preference?

USER: I am ok with any airline.

ASSISTANT: Is there any other requirements?

USER: I prefer to travel in business class flight.

ASSISTANT: May I know your name?

USER: My name is Ryan Harris.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.