Simple gossip

local Entry = 123 -- NPC entry
local npc_text = 700000
local T =
{
--  {icon, "Name", npc_text+X},
    {0, "I would like to know how the server works", npc_text+1},
    {0, "I would like to know how I level up", npc_text+2},
    {0, "I would like to know where the mall is located", npc_text+3},
    {0, "How can I find other players?", npc_text+4},
}
local D = #T

function T.Hello(pUnit, event, pPlayer)
    pUnit:GossipCreateMenu(npc_text, pPlayer, 0)
    for k, v in ipairs(T) do
        pUnit:GossipMenuAddItem(v[1], v[2], D+k, 0, '', 0)
    end
    pUnit:GossipSendMenu(pPlayer)
end

function T.Select(pUnit, event, pPlayer, id, intid, code)
    if(intid > D) then
        pUnit:GossipCreateMenu(T[intid-D][3], pPlayer, 0)
        pUnit:GossipMenuAddItem(0, "Back..", 0, 0, '', 0)
        pUnit:GossipSendMenu(pPlayer)
        return
    end
    T.Hello(pUnit, event, pPlayer)
end

RegisterUnitGossipEvent(Entry, 1, T.Hello)
RegisterUnitGossipEvent(Entry, 1, T.Select)