Final answer:
Upon a patient canceling an appointment, promptly offer to reschedule and provide contact information to demonstrate care and professionalism.
Step-by-step explanation:
Immediately after a patient calls to cancel an appointment, the appropriate action would be to offer to reschedule the appointment for a more convenient time. It is also important to leave your contact information and express your willingness to help find a solution that suits the patient's needs. This indicates that you care about the patient's well-being and the continuity of their care while maintaining professionalism.