How do I move the player toward the direction they are facing without BodyVelocity?

I have a dash script that is supposed to teleport the player 10 studs ahead of themselves, but it ends up just teleporting the player to a position completely unrelated.

Here is my code:

(This code only includes the part with the problem)

local function Dash()
	Moving.Value = true
	print("Dash Foward")
	HumanoidRootPart.CFrame = CFrame.new(HumanoidRootPart.CFrame.lookVector) * CFrame.new(0, 0, -10)
	wait(0.3)
	Moving.Value = false
end

Here try this:

-- Put this on Line 4
HumanoidRootPart.Velocity = HumanoidRootPart.CFrame.lookVector * 300 -- Change this number to what ever you want

If it doesn't work dm me on discord, supernova#0034

If you multiply a CFrame the position will be relative

local function Dash()
    Moving.Value = true
    print("Dash Foward")
    HumanoidRootPart.CFrame = HumanoidRootPart.CFrame * CFrame.new(0,0,-10)
    wait(0.3)
    Moving.Value = false
end