Then, the email would say: “Ms. Smith, Fluffy’s next appointment is on Monday the 12th at 1:00. Please click to reply/confirm this appointment at [name of practice]. If we do not hear from you in the next five business days, this slot may be given away. Thank you.” "Does that mean the number of incoming calls and voice mails are also in massive decline in the world of veterinary medicine in favor of electronic communication? Probably not."
One episode of The Simpsons has Homer and Marge buying a book about trying to invoke this trope, and end up trying to record a message together while reading out of it. It sort of goes without saying, but it ends up being So Unfunny It's Funny.. A season 2 episode had Homer calling Barney for bail, and initially gets an answering machine message sung to the tune of Beethoven's Fifth Symphony.

“So I start by talking as if I answered the phone, like: ‘Hello? It’s Tom, is anyone there?’” Fulton eagerly explained, unaware that no one would ever stay on the line long enough to hear the voicemail he spent his entire Sunday crafting. “But that’s the joke — it’s just a message! Whoever is calling will be talking to no one,” Fulton added, failing to recognize that he was actually talking to no one since his message would never be played back by anyone under any circumstances.
If, on the other hand, your clients work with a number of team members, you might consider hiring a voiceover professional to record your greeting. While a recording with a voice actor is an extra expense, the result often outweighs the cost.