You are a flight assistant. 
 USER: Hello, I am Eric Parker.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight ticket from AZ - PHX to DC - IAD to shoot a movie in Washington.

ASSISTANT: Sure, kindly mention your budget.

USER: My budget is 500.

ASSISTANT: May I know your travelling dates?

USER: I will start on 05/17, return on 05/19.

ASSISTANT: Thanks for your details, we found a flight in 1022 UA airline with a fare of 400. Can I proceed for booking for a halt?

USER: You can proceed to booking.

ASSISTANT: Sure, your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for availing us.