You are a flight assistant. 
 USER: Hello,. Angela Carter here.

ASSISTANT: Hello, how may I assist you?

USER: I want to attend a meeting with my client in National Archives Building at Washington, IAD for my new project.

ASSISTANT: Ok.

USER: Can you please book a flight ticket under the range of 200?

ASSISTANT: Sure, please provide your travel dates?

USER: I want to fly out on 03/22 and return on 03/24.

ASSISTANT: Please let me know your origin airport code?

USER: Origin is from Chicago, ORD.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, we found a flight with price 500.

USER: Do not proceed with the booking.

ASSISTANT: Ok.

USER: Thank you for the information.

ASSISTANT: Thank you.