We are calling to 'confirm your appointment' with Dr. Jones. = We are calling to make sure that you will 'keep your appointment' with Dr. Jones.
The museum is open to visitors 'by appointment' only. [=you have to make an appointment to visit the museum]
The court ordered the 'appointment' of an attorney to represent the child.
(..) Spit. Ulysses, stop that a moment. Mr. Moore? I didn't see your name in the appointment book. Do you... My teeth are quite fine, thank you, but I do have a question. Have you ever encountered (..)2018 TvShow: The Alienist Title: These Bloody Thoughts Season: 1 Episode 4