7. "Hello, this is [your name] at [company]. Thanks for calling. Please leave your name, number, and the reason you'd like to chat, and I'll get back to you ASAP.
Your message is a period of time that they are forced to wait through in order to do what they called to do in the first place — relay information to you.

If you only check and return messages once a day or once a week, let your caller know. This will avoid multiple messages by the same caller.
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.