You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit IAH to meet my best friend, can you help me to book a flight ticket from IAD?

ASSISTANT: Sure, please mention your preferable travel dates.

USER: My travelling dates are 23 and 25 of July.

ASSISTANT: May I know your name?

USER: I am David Jackson.

ASSISTANT: Do you have any connection limit preference for this trip?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Delta Airlines is providing direct flight on this route with a ticket fare of 100 and flight departs at 11:00 hours and arrives at 2:00 hours, shall I book your ticket in this flight?

USER: Please proceed to booking.

ASSISTANT: Your booing is confirmed and the flight number is 1023.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us.