You have reached (Your Name) at (Your Business). We help (What Your Business Does). I wasn’t able to take your call right now, but leave your name and number and I’ll get back to you as soon as I can.
Does your organization have a witty catchphrase or slogan? If so, use that to your advantage. Here is one that could be tailored towards a custom software company:

Most voice mail users have a desk phone line, which rolls calls to a voice mailbox. Customers with virtual telephone numbers (TNs) do not have a physical desk phone for this number. If you use voice mail with a Cox virtual TN, refer to the tips listed below. If you have a virtual TN, the related voice mailbox should be pre-set by Cox voice mail teams. If you cannot access the box from a valid access number, contact a Cox representative to make sure that the mailbox is initialized. When you log in to the mailbox, you need to update the PIN, record a new greeting, and record your name. Use voice mail and features as necessary. Paging Notification
The simple truth is that you need to be more aware of what you’re leaving for other people to hear. Sure, this doesn’t always register as a priority for users, but it’s never too late to reassess your greeting. a. Reading/Speaking in the Imperfect Tone: Tone is absolutely everything. Users don’t want to come off as being too nice, as it sounds insincere, or being too terse, as it can be interpreted as being rude. That being said, striking the right balance is absolutely essential. Your greeting exists as its own entity, and therefore, it should NOT rely on callers’ familiarity with you. Instead, it needs to appeal to the masses. As such, your inflection, i.e. the way you state your name and directions, needs to be both welcoming and firm. b. Injecting Humor & Insincerity: While humor/light heartedness can be welcoming, it can also convey a sense of informality, insincerity, and ultimately unprofessionalism. Why, because you’re not there to lend your humor or to contextualize. Instead, you’re assuming the caller has a working knowledge of your personality to ground the message. Though this might not sound like it’s all that terrible—it can be detrimental. As stated above, one should NEVER rely on a caller’s familiarity with you. Instead, aim to appeal to the masses. Humor is ultimately subjective, meaning not everyone has the same tastes; therefore, someone is bound to be turned off by a quirky or off-color remark. While implementing a light-hearted or even tongue and cheek tone can work, it’s just a really bad idea.