You have been invited to attend an interview for a place on a course of study at a college. Unfortunately, because of a previous appointment, you cannot go to the interview at the time they wish.
Write a letter to the admissions tutor. In your letter
explain why you cannot keep the appointment
apologise and offer to arrange a new appointment
ask how long the interview will be, and whether there will be any tests during it
You should write at least 150 words.