But texting streamlines the entire process. And the COVID-19 pandemic quickly transformed this luxury service into a basic purchasing method consumers expected businesses to facilitate. And while we had seen restaurants and big box stores dabble with curbside pickup before the pandemic, innovative businesses in other categories quickly developed clever curbside experiences. Healthcare providers, salons, and other companies have essentially used “curbside pickup” to create safer and more comfortable curbside check-ins. Customers pull into the parking lot, check-in via text, and sit comfortably in their car, awaiting a text back telling them when it’s time to come in for their appointment.
If the you haven't changed your personal greeting, a default system greeting will be played for callers. For example, "Please leave a message for John Smith. After the tone, please record your message. When you finish recording hang-up or press the pound key for more options."

You might also consider giving them the option to skip your voicemail message completely by pressing another key (again, check with IT). You also want to make callers aware what you will return their call, instead of telling them that you will try to return their call--and let them know when you are likely to do it, if possible. If necessary, provide additional or emergency information in your voicemail greetings. My dentist, for example, lists his cell phone number for emergencies.
Website: https://www.onsip.com/voip-resources/smb-tips/after-hours-voicemail-and-auto-attendant-greetings