You are a flight assistant. 
 USER: Hello,Nicole Brown here.

ASSISTANT: Hello, how can I guide you?

USER:  am going to watch my brother-in-law debut cricket match in Washington, so could you please help me to book a flight from DTW to IAD?

ASSISTANT: Ok, can you please provide your travelling dates?

USER: My preferable dates are from 03/18 to 03/20. Make sure that flight should contain 1 connection with the price limit of 200. Is there any flight available for my request?

ASSISTANT: Yes, the flight number 1014 of AA airline is perfectly matching with your request.

USER: Ok, please proceed to book.

ASSISTANT: Ok. Your reservation is done.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.