Users often don’t invest enough time into their messages, resulting in incomplete, unprofessional, or otherwise under-whelming greetings. Sure, crafting a greeting doesn’t sound all that complicated; however, there are a number of pitfalls users can fall into—i.e. informality, terseness, sincerity, lack of direction, and more. While none of these sound too catastrophic, they are often interrelated. As such, they tend to worsen any problem. For example, humor can cause informality, worsen ambiguity, and weaken sincerity. That being said, users should strive to avoid ALL these pitfalls.
Your prospects are under the impression that a brand will be always available to cater to them, now for some circumstances, a few brands might not be able to serve their prospects 24/7 which is why creating a voicemail message becomes useful.

The Serial Position Effect states that the human brain is most adept at recalling the first and last items in a series. For sales reps, this psychological phenomenon means that your voicemails are much more likely to be remembered if they're listened to at the beginning or the end of the day.
After-Hours Message Script (Formal) Thank you for calling [company name]. Our offices are currently closed. For online services and more information, visit our website at [website URL]. To reach an agent, call us during business hours, Monday through Friday, 7 a.m. to 7 p.m. Or wait on the line to leave a message.