You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planing to visit New York, will you help me in booking the light ticket from IAD to JFK?

ASSISTANT: Sure, may I know your trip dates?

USER: My travelling dates are Aug 14 and Aug 16.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: I always prefer business class.

ASSISTANT: May I know your name?

USER: Myself Steven Jones.

ASSISTANT: Sorry, there are no flights found on your trip dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.