How to make a gui pop up with only in a dialog?

Not sure why but I tried to do this script

script.Parent.Script.remote.Value.Parent.DialogChoiceSelected:Connect(function(player,choice)
    if choice.Name == "WhenGuiPopsUp" then
        script.Parent.Script.remote.Value:FireServer(player)
        script.Parent.Script.remote.Value.Parent:Destroy()
    end
end)

And It did nothing, That's why I'm asking "How to make a gui pop up with only in a dialog"

So what I mean, is when a dialog choice is selected it will pop up a gui.