You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in booking my flight from DTW to reach PHX?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: My travel dates are Sep 10th and 12th.

ASSISTANT: On whose name I have to book the flight ticket?

USER: You can reserve on the name of Karen Wilson.

ASSISTANT: Any connection limit do you have?

USER: I need a single connecting flight.

ASSISTANT: Do you have any class preference?

USER: I prefer business class.

ASSISTANT: Is there any other preferences do you have?

USER: No.

ASSISTANT: Please be on hold to check the flights.

USER: Ok, sure.

ASSISTANT: Unfortunately there are no flights running on your route with your required preferences.

USER: Ok, not a problem. Anyways, thank you.

ASSISTANT: Welcome.