How would i tween:Cancel() when i hit the ground?

This is a part of a dodge script for my game, what's happening in this script is the tween is what's moving me when I dodge but the problem is I can phase into the ground when I dodge, I've been trying to put something where if I touch a block the tween cancels but it wont work for me. If you have any questions please reply to this post. SCRIPT:

game.ReplicatedStorage.DownDodge.OnServerEvent:Connect(function(player)
	local tweenService = game:GetService("TweenService")
	local part = player.Character.HumanoidRootPart
	
	if debounce[player.UserId] == nil then
		debounce[player.UserId] = false
		alreadydodged[player.UserId] = nil
		counterparthappened = true
	player.Character.LowerTorso.DodgeCircle.Trail.Enabled = true
	player.Character.LowerTorso.DodgeCircle.Transparency = 0
	player.Character.HumanoidRootPart.Anchored = true
	local goal = {}
	goal.CFrame = CFrame.new(player.Character.HumanoidRootPart.Position + Vector3.new(0,-12,0)) * CFrame.Angles(0, 0, 0)
	local tweenInfo = TweenInfo.new(.2)
	local tween = tweenService:Create(part, tweenInfo, goal)
	tween:Play()
				
	--Cancel tween right here when block touched
	
	wait(.2)
	player.Character.LowerTorso.DodgeCircle.Transparency = 1
	player.Character.HumanoidRootPart.Anchored = false
		player.Character.LowerTorso.DodgeCircle.Trail.Enabled = false
		wait(Time)
		if alreadydodged[player.UserId] == nil then
		wait(Time2)
		debounce[player.UserId] = nil
		else debounce[player.UserId] = nil
		end
	end
end)

NOTE: if you can't help me by the player touching the ground, I have a hitbox block that's located in lower torso that wraps around the player

So I'm just going to provide code that you'd paste in where your comment is.

All you would do is

local hitbox = your hitbox
hitbox.Touched:Wait()
tween:Cancel()

It's literally that simple.

You could use the FloorMaterial property of the Humanoid.

if not Humanoid.FloorMaterial == Enum.Material.Air then
--If the player is not in the air, then they are physically touching something
     tween:Cancel()
end)