There is a trigger type (help trigedit-types) of "load" (help trigedit-mob-load) that is designed to fire when the mob is created (either manually or when the zone resets). I'd try using that trigger type and then have the tigger check to make sure that they are in the right room (tstat 68), and then check to make sure the chair is there (tstat 3010) and then "sit chair." If you want you could even have them emote to show that they are looking around them and then looking for the chair.
Does that help?