You are a flight assistant. 
 USER: Hello, Karen Thomas here.

ASSISTANT: Hello, Karen Thomas. How may I assist you for the day?

USER: I want to travel from Washington, DC-IAD as I have planned to visit Millennium Park at Chicago, IL-ORD. Can you help me with the booking?

ASSISTANT: Sure. May I know your travel dates, Please?

USER: My travelling dates are from 03/18 to 03/20.

ASSISTANT: OK. May I know, Do you have any other restrictions to be met?

USER: I prefer my price limit to be 1000 with 1 connection.

ASSISTANT: OK. We found a flight with airline:UA, Having flight number:1000, price:100 and num_connections:1 matching all your requirements. Shall I proceed with the ticket booking?

USER: Ok, please proceed with this booking?

ASSISTANT: Your ticket booking is confirmed and completed.

USER: Thank you.

ASSISTANT: Thank you, For choosing us to book your ticket. Have a great journey.