You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am planning to go for a meeting at Phoenix, can you please help me in booking?

ASSISTANT: Sure, How much do you want to spend on your ticket?

USER: I can spend 500 for my ticket.

ASSISTANT: Ok, May I know your planned dates of your travel?

USER: My planned dates are from 06/05 to 06/07.

ASSISTANT: Ok, please mention your journey airport codes.

USER: I would like to board from DC-IAD and land at AZ-PHX.

ASSISTANT: Ok, please standby.

USER: Ok.

ASSISTANT: Thank you for waiting, There is a flight found in 1012 Southwest plane with a fare of 100. Can I proceed for booking?

USER: Ok, you can proceed.

ASSISTANT: To proceed for booking, May I know your name?

USER: Sure, I am Donna Martin.

ASSISTANT: Ok, your ticket has been booked with a halt.

USER: Thank you.

ASSISTANT: Thank you for approaching us.