how to make click detectors detect when the player chats ?

ok so the tile explains itself, i want to make that when the player click the part a dialogue pops up (done) but to response the dialogue u need to type in chat, but it just detects the message multiple times

code:

script.Parent.ClickDetector.MouseClick:Connect(function(plr)
repeat wait until plr.Chatted

plr.Chatted:Connect(function(msg)
	if msg == "yes" then
		print("test")
	end
end)

when i use it once, it works perfectly fine, but when i talk to him again, it fires twice.