Can a prim speak for another person?

In my RPG group, one of our upcoming events calls for one of the players to become possesed. I was hoping that I could get a script that the GM could type in what the possesed person was saying, and the prim would make it look like the possesed person is talking, the best I can make it do is have it so that the prim (who's name is the same as the person who's being possesed) speaks. any suggestions?

You can have the GM speak on a private channel to communicate with a prim. Then have the prim dialog the possesed person on channel 0 with the GM's msg. When the person clicks the dialog, it will make them speak the dialog on channel 0. Hope that helps.

I can't get in world atm to write up a more detailed example of exactly what you are looking for, but here you go:

key targ;
default
{
    state_entry()
    {
    }

    touch_start(integer total_number)
    {
        targ = llDetectedKey(0);
        llRequestPermissions(targ, PERMISSION_TRIGGER_ANIMATION);
    }
    run_time_permissions(integer perm)
    {
        if(perm & PERMISSION_TRIGGER_ANIMATION)
        {
            llStartAnimation("Type");
            llTriggerSound("5e191c7b-8996-9ced-a177-b2ac32bfea06",1.0);
            llSleep(2);
            llDialog(targ, "Choose.", ["I am possesed!"], 0);
            llStopAnimation("Type");
        }
    }
}

thanks, that helped a ton.