You are a flight assistant. 
 USER: Hello, I am Mark Williams.

ASSISTANT: Hello Mark Williams. How may I guide you today?

USER: Could you please book a flight ticket to DFW from DCA with a connecting flight?

ASSISTANT: Sure, I am glad to assist you with that. Can you please provide your preferable dates of travelling?

USER: I want to depart on 28th Mar evening and return back on 30 Mar.

ASSISTANT: Is there any additional requirements do you have?

USER: I can afford up to 500 for a ticket.

ASSISTANT: Please hold on a moment to check the flights on your route.

USER: Sure.

ASSISTANT: Based on your information, I have found a flight with 1 connection having with the fare of 100 provided by Delta airlines. Are you ok with this?

USER: Yes, please confirm my ticket with this flight.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1006.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us, have a great journey.