add warning when trying to leave house

[warera]

hi

i'm looking for someone to edit my leavehouse script so when someone is using !leavehouse they should receive a warning text saying that all their items in the house will delete all the items and if they accept it they must say !leavehouse yes

function onSay(cid, words, param, channel)
	local house = getHouseFromPos(getCreaturePosition(cid))
	if(not house) then
		doPlayerSendCancel(cid, "You are not inside a house.")
		doSendMagicEffect(getCreaturePosition(cid), CONST_ME_POFF)
		return false
	end

	local owner = getHouseInfo(house).owner
	if(owner ~= getPlayerGUID(cid) and (owner ~= getPlayerGuildId(cid) or getPlayerGuildLevel(cid) ~= GUILDLEVEL_LEADER)) then
		doPlayerSendCancel(cid, "You are not the owner of this house.")
		doSendMagicEffect(getCreaturePosition(cid), CONST_ME_POFF)
		return false
	end

	setHouseOwner(house, 0)
	doSendMagicEffect(getCreaturePosition(cid), CONST_ME_MAGIC_BLUE)
	return false
end

thanks in advance