You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am looking for a flight from JFK to DEN, can you please help me in booking?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My travelling dates are Aug 13 and Aug 15.

ASSISTANT: May I know your name to proceed further?

USER: My name is Kenneth Moore.

ASSISTANT: May I know your class preference?

USER: I prefer business class.

ASSISTANT: Do you have any limitations in connection?

USER: No.

ASSISTANT: Is there any limitations in flight timings?

USER: I want to return in afternoon.

ASSISTANT: Sorry Kenneth Moore, there is no flight in your route as per your requirement.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.