Caller option to exit voicemail and go to hunt group

Is there a keystroke that an outside caller can use to not leave a voicemail and instead be routed to a hunt group? 

I would like to have an outgoing voicemail greeting that says:

"Hello, you have reached [me]. Please leave a message or, if you are calling during business hours and would like immediate assistance, please dial [x]."

Dialing [x] would exit the voicemail system and route them to a specific hunt group we have set up.