Best way to make Sign usign ("UserInputService")?

I'm trying to create undertale sign, that after pressing "z", will show you gui with message, but I don't know what's the best way to make it. Here's my script:

--Normal Script
local UIS = game:GetService("UserInputService")

UIS.InputBegan:connect(function(Input)
    local MouseInput = Input.UserInputType
    local KeyCode = Input.KeyCode 

    if KeyCode == Enum.KeyCode.Z then
		local player = game.Players.LocalPlayer
		if player.PlayerGui:FindFirstChild("TextGui") then return end					
			if player.Sign.Value == true then
				local r = game.ReplicatedStorage.TextGui:Clone()
				r.Parent = player.PlayerGui
			end
    end
end)



--Sign is BoolValue
script.Parent.Touched:Connect(function(hit)
	local player = hit.Parent
	local player2 = game.Players:GetPlayerFromCharacter(hit.Parent)
	if player and player2 then
		player.HumanoidRootPart.Anchored = true
		player2.Sign.Value = true
	end
end)

script.Parent.TouchEnded:Connect(function(hit)
	local player = hit.Parent
	local player2 = game.Players:GetPlayerFromCharacter(hit.Parent)
	if player and player2 then
		player2.Sign.Value = false
		if player2.PlayerGui:FindFirstChild("TextGui") then
			player2.PlayerGui.TextGui:Remove()
		end
	end
end)

That seems like it should work perfectly fine.