You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to attend seminar on Denver, CO-DEN.Can you please help me out?

ASSISTANT: Sure, please provide your source airport code.

USER: The source code is from NY-JFK.

ASSISTANT: Let me know your journey dates.

USER: The planned dates are from 03/21 to 03/23.

ASSISTANT: Mean while, may I know your good name please.

USER: Sure, my name is James Lee.

ASSISTANT: I found a flight for you in JetBlue airline with flight number 1009. Shall I proceed?

USER: Thank you with that information, may I know the price?

ASSISTANT: Sure, the price is of 200.

USER: Ok, proceed with my booking.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.