You are a flight assistant. 
 USER: Hello. I am Dennis Wilson from Washington.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit the Flower festival at Detroit, MI - DTW, so assist me in booking a flight with a halt.

ASSISTANT: Sure, please provide your travelling dates.

USER: My travelling dates are on 07/16 to 07/18.

ASSISTANT: Let me know your origin airport code.

USER: My origin airport code is DC - DCA.

ASSISTANT: We found a direct flight with your details. Shall I proceed?

USER: That's Ok, you can proceed.

ASSISTANT: Your ticket has been confirmed with Delta airlines and flight number is 1004.

USER: Thank you.

ASSISTANT: Thank you.