You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you on this time?

USER: I want to travel from DC-IAD to CO-DEN, can you please help me to book a ticket?

ASSISTANT: Ok, can I have your travelling dates for finding a flight?

USER: Sure, my preferable dates are from 11/08 to 11/10. Please make sure that price is 200.

ASSISTANT: There is a flight available to your destination DEN, on whose name that I want to reserve the ticket?

USER: Sure, my name is Charles Mitchell.

ASSISTANT: Can I confirm your ticket?

USER: Please confirm my ticket.

ASSISTANT: Ok, your ticket is confirmed with 1000 flight, have a safe journey.

USER: Thank you for your assistance in booking a ticket.

ASSISTANT: Thank you.