You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Scott Young, I want to book a flight ticket from DCA to MSP in the month of March in a business class. Can you please help me about that?

ASSISTANT: May I know your desired travel dates please?

USER: Thank you for considering my request, my desired travel dates are 03/02 and 03/04.

ASSISTANT: Please wait a while. Sorry to say, there is no flight on your desired travel dates.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for contacting us.