My boss would need to know that I am not in good health condition to function successfully at my job the following day, and my need for rest in order to have a fast recovery. The impact should demonstrate my clear communication and avoiding confusion, concern, or unexpected news the morning of the meeting.

I would want my boss to know that I got sick as soon as possible and that I am not feeling well enough to come tomorrow for the meeting. I would make sure the email sounds professional and informative while maintaining it short and to the point. Avoiding unnecessary details and over explaining my self. and for the identity goal, I would want them to use clear communicator, professional, and responsible.