You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I want to book the flight ticket from IAD to JFK. Can you please help me?

ASSISTANT: Sure, please share me your travel dates.

USER: Dates are Nov 13 and Nov 15.

ASSISTANT: Do you need direct flight or connecting flight?

USER: Connected flight required.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Kimberly Lewis.

ASSISTANT: May I know your class preferences?

USER: Business class required.

ASSISTANT: May I know your arrival and depart timings?

USER: Arrival time is afternoon and depart time is morning.

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

USER: Not an issue. Thanks for checking.

ASSISTANT: Thank you for opting us.