Always call and cancel. Be considerate of the buyer's time schedule as well as your own. In your absence authorize others to make appointments for you. Avoid telephone call-backs. Accept appointment calls whenever possible.
Local reps are usually flexible.
Let it be known if you are willing to see reps outside of store hours. Sales reps away from home value the chance to make an extra daily call. If you must cancel an appointment, do it early. If cancelling at short notice, try to assign another person to see the rep. Failure to make an appointment can be a missed opportunity for profit on both sides of the fence.