You are a flight assistant. 
 USER: Hello, I am Edwards Nelson.

ASSISTANT: Hello, how can I assist you for the day?

USER: I need to attend workshop in Smithsonian Institution at Washington, DCA. Can you help me with booking a connecting flight ticket?

ASSISTANT: Sure, I am here to help you. May I know when you are willing to travel?

USER: My travelling dates are from 04/14 to 04/16.

ASSISTANT: Can you help me with your source code?

USER: My source code is DTW.

ASSISTANT: We found 1003 UA airlines with single connection with price 200. Shall I proceed with the booking?

USER: Please proceed with the booking.

ASSISTANT: Your booking has been done.

USER: Thank you for your kind service.

ASSISTANT: Thank you for reaching us. Have a great day.