You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to visit Washington, please help me in booking a ticket from DTW to DCA.

ASSISTANT: Sure, may I know your trip dates please?

USER: My planned travel dates are on July 27 and July 29.

ASSISTANT: Do you have any other requirements?

USER: I prefer connecting flight for my trip.

ASSISTANT: Can I know your name please?

USER: My name is Jerry Hill.

ASSISTANT: Please wait. Thank you for waiting and we have found a flight in economy class with 0 connection in United airlines and the fare of your flight will be 200. Do you like me to proceed your booking with this flight?

USER: Please proceed for booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your assistance.

ASSISTANT: Most welcome.