Is there a event to check if a Player is far away enoug?h for dialogue?

So I have a script that makes a GUI Pop up when you press a dialogue

the problem was that I wanted the GUI dissapear when the player is too far from the dialogue

is there any way?

-- // Local script
local plr = game.Players.LocalPlayer
local part = -- // Target part
local max = -- // Max distance
local dialogue = -- // Dialog
while wait() do
	if (plr.Character.HumanoidRootPart.Position - part.Position).magnitude <= max then
		dialogue.Visible = true
	else
		dialogue.Visible = false
	end
end

This should work.