Change Voicemail menu


I am using FreePBX for our Hotel phone system.

We are providing voicemail for our guests, but I do not want them to be able to change the voicemail greetings and other options.

Is there a way I can remove some of the voicemail options for some extensions only?

Or alternatively, can I change the recordings use for the voicemail menu, so that the user is not prompted with the options which they should not have access to? If so, which recordings do I change?

Thanks in advance,