You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you at this moment?

USER: Can you help me to book a flight from DEN to IAD?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: My travelling dates are May 08 and 10.

ASSISTANT: Do you have any other specifications for this trip?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other specifications for this trip?

USER: No.

ASSISTANT: May I know your good name please?

USER: My name is Helen Allen.

ASSISTANT: Delta Airlines is providing connecting flight on this route with a ticket fare of 700 and flight departs at 22:00 hours and arrives at 16:00 hours, shall I book your ticket in this flight?

USER: Proceed with booking.

ASSISTANT: Helen Allen, your ticket is booked in business class of flight number 1014.

USER: Thank you for your help.

ASSISTANT: You are welcome and have a safe journey.