NWScript:

////////////////////////////////////////////
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//////  NPC - Sit and Talk
//////  Causes NPC to sit and face in the
//////  Direction of the chair while talking
//////  to the PC.
////////////////////////////////////////////
////////////////////////////////////////////
//////  Scripted by: Weeping Ashes
//////  Date:  July 1, 2002
//////  Scripting Time:  33hrs 14 mins
//////  Is aware he is a newbie...
////////////////////////////////////////////
////////////////////////////////////////////
/////  Make sure you have a sit command in
/////  OnSpawn part of your NPC.  Otherwise
/////  This will make the NPC sit AFTER the
/////  conversation.
////////////////////////////////////////////
////////////////////////////////////////////
void main()
{
    if(GetCommandable(OBJECT_SELF)){
     //This sets the NPC as the speaker
    {
        BeginConversation();
         //This starts the conversation script.
        }
    ClearAllActions();
     // Clears the actions so the NPC will not follow you with his/her eyes
    int nChair = 1;
    object oChair;
    oChair = GetNearestObjectByTag("chair01", OBJECT_SELF, nChair);
    ActionSit(oChair);
     //Sits the NPC down
    }
}