Depending on the semester, I can have literally hundreds of students vying for limited appointment slots so that missing an appointment not only disrupts my own schedule but it impedes my other students' progress.
Therefore, I nip this issue in the bud.
That said, life happens. I certainly do understand that missing your appointment may have been unavoidable. To that end, I am inclinded to give a second (and last) chance, so click "Next" and submit this petition.