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

ASSISTANT: Hello, How can I assist you?

USER: I would like to go from IAD to MSP, can you please book me a ticket?

ASSISTANT: Sure, May I know the price limit and journey dates?

USER: Please make sure price limit should not exceed 1000. My travelling dates are from 06/22 to 06/24.

ASSISTANT: Ok, Wait a while, I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for waiting.

USER: No problem.

ASSISTANT: Flight number:1004, Airline: UA with direct flight. Shall I proceed?

USER: No, don't proceed for booking.

ASSISTANT: Ok, Thank you.

USER: Thank you.