Service for professional-sounding outgoing voicemail message on home landline phone?

We have a small, home-based online business and communicate with our customers primarily via email. However, we do get the occasional customer inquiry on our residential land line (once or twice a month, if that). Often we are working with clients and unable to answer the phone immediately. Any suggestions for inexpensive services that provide a professional-seeming experience for these folks?



Basically, I just want an outgoing message that confirms they've reached the right place and that we'll respond within 24 hours. We could do it ourselves, but is there a better alternative?