function Healer_OnTalk(Unit, event, player)
Unit:GossipCreateMenu(50, player, 0)
Unit:GossipMenuAddItem(0, "Heal Me!", 1, 0)
Unit:GossipSendMenu(player)
end

function Healer_OnSelect(unit, event, player, id, intid, code)
if (intid == 1) then
Unit:SendChatMessage(12, 0, "You have been healed! Come again!")
player:SetHealthPct(100)
Unit:GossipComplete(player)
end
end

RegisterUnitGossipEvent(444444, 1, "Healer_OnTalk")
RegisterUnitGossipEvent(444444, 2, "Healer_OnSelect")