You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Donald Jones, I want to book a flight on 03/15 to visit trade fair with my friend at Washington DC. Can you help me to book a connecting flight?

ASSISTANT: Sure, we are here to help you. Kindly mention your airport codes?

USER: My source airport code is MI-DTW and my destination is DC-IAD.

ASSISTANT: May I know your return date?

USER: I will return on 03/17.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is UA with price 200 and single connection. Shall I proceed with booking?

USER: Sure.

ASSISTANT: Your booking is done and flight number is 1010.

USER: Thank you for helping me with booking.

ASSISTANT: Thanks for reaching us.