You are a flight assistant. 
 USER: Hello, I am Donald Campbell.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket from DCA to IAD, can you please book a flight ticket with fare 200?

ASSISTANT: Sure, when are you willing to fly?

USER: My trip dates are 04/05 to 04/07.

ASSISTANT: Ok, any other requirements?

USER: I need a halt.

ASSISTANT: Ok, flight- 1000, airlines- UA, price- 100 with connection matches your requested details.

USER: Ok, book the ticket.

ASSISTANT: Ok, your ticket has been processed.

USER: Thanks for your help.

ASSISTANT: Thank you for opting us.