You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please reserve me a flight ticket from JFK to IAD.

ASSISTANT: Sure, may I know the planned travel dates?

USER: My travel dates are Apr 20 and Apr 22.

ASSISTANT: Please provide me the specifications.

USER: I would like to prefer depart in the afternoon time. I prefer connecting flight for this trip.

ASSISTANT: May I know the name?

USER: I am David Miller.

ASSISTANT: Here, I found a flight with 1 connection and airfare is about 600. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: In a business class, your ticket has been confirmed for the flight 1003 in Southwest Airlines.

USER: Thank you.

ASSISTANT: Thank you for reaching us.