4. Voicemail greetings for calls received after business hours. You don’t want to answer calls 24/7 (unless you’re serving clients globally and there’s an expectation of 24/7 support).
You may additionally want to bear in mind that people might be calling you from their cellphones, and a long message can use up someone’s valuable cellphone minutes. Some voicemail systems have the option of pressing a key like the pound key to immediately start recording a message; you may want to consider the funny or long message only if you have this option available to callers. Another point of consideration when recording an answering machine greeting is who is likely to call. If you’re job hunting, for instance, you may want to drop the funny salutation for a while, and use a more standard and businesslike greeting, unless you’re applying for jobs as a comic. Is Amazon actually giving you the best price? This little known plugin reveals the answer. Some answering machines utilize cassette tapes.

Education Details: Professional Greetings . When to use a professional greeting: If you don't know the person well, it is best to use Mr., Ms., or Dr. as an appropriate business letter salutation. If you have any doubts about which greeting you should use, err on the side of caution and use the more formal style of address.
Note that the secretary has asked for the reason for calling so she can prioritize the patients who need the most help. She’s also keeping it short and to the point.