You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best assist you today?

USER: I need you to book a flight ticket to Phoenix.

ASSISTANT: Sure, please share me your airport codes.

USER: DFW and PHX are my airport codes.

ASSISTANT: May I know your journey dates?

USER: October 24 and 26 are my planned travelling dates.

ASSISTANT: Is there any class preferences for you?

USER: I prefer to fly in a business class.

ASSISTANT:  Do you need direct flight or connecting flight?

USER: I prefer to fly in a connecting flight.

ASSISTANT: Please share me your other specifications.

USER: Nothing much to share.

ASSISTANT:  Sorry to say that, there are no flights available on the routes of your journey.

USER: That's ok.

ASSISTANT: Please mention your good name.

USER: Sharon Roberts here.

ASSISTANT: Thank you for opting us.