If done tastefully, you can promote your products or services on your voicemail greeting without sounding pushy. In fact, it’s a great way to keep customers up-to-date on company events, sales, and other news. Be sure to keep it short and have fun with it.
Solution: Poor sound quality is unlikely the fault of a reliable business voicemail service that uses VoIP technology, Baldwin says. So garbled voicemails are often due to callers’ poor mobile phone reception while leaving their message—and you may just need to call them back, assuming you can figure out their phone number. But if the problem does seem to be your voicemail, make sure you’re using a business phone and voicemail service that uses VoIP and not relying on, say, your mobile phone’s voice mailbox.

In this case, the agent shows concern for the customer and wants to serve him in the best possible manner. The agent is also polite and courteous.
Hi, you have reached (names) voicemail. If you want money or to sell us something, we a) gave at the office, b) already have it, or c) don’t want it. If you are a friend, trying to give us money or just want to talk, then leave a message or try my cell phone number. I don’t know who you are, and I don’t know what you want.