Assuming that you have to go through the rigmarole of having one. Mine is:
"[Greeting] You have reached the voicemail of [full name] on [day and date]. I am in the [location] office today and away from my desk. If you have a research enquiry please submit your request using the online form called Research and Enquiry, located under Key Tools on Insite. Alternatively, please leave a message or press 1, before the tone, to speak to another member of the team. You can also dial 2 to be put through to my mobile. Thank you."
I'm interested to see what inane babble you people have to tell your telephone each morning and/or evening.