You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you reserve me a ticket from SEA to LGA?

ASSISTANT: Sure. May I. May I know your class preference please?

USER: My trip dates are Dec 15 to 17.

ASSISTANT: May I Know your name please?

USER: Robert Collins here.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight in business class.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. I have found a economy class flight in American airlines and it is a single connecting flight.

USER: Please check the flight with business class.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Sorry presently there are no flights available in business class.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you.