Create contact note for people added as 'Non User' in an event

My trainers and assessors conduct 'Onsite Assessments' and 'tutorials' for individuals and therefore they create Events in the Calendar. They add the contact/student as a 'Non User' contact on the Event and select notify to inform the office, which results in an email informing of the 'event'. This is then cut and pasted into the 'student's contact notes'. I suggest that a contact note, with similar information to the system generated email, be automatically added to the 'Non User' contacts notes.