Move my character quickly like a dodge?

Hello, I want to give the character controller a new ability, a boost It would be like this: when I press E+ a button for a direction, I want my character controller to quickly move to this direction (like if i'm looking in front of me, and I press the left arrow of the keyboard, then my character controller will be pushed at the left) Its like a "dodge" How do i write this? and how can i choose the speed of the boost?

             if (Input.GetKey(KeyCode.E))
             { 
                 if (Input.GetKey(KeyCode.Z))
                 {
                     isUsingBoost = (true);
                     //moveDirection = Vector3.forward;
                     //moveDirection = transform.forward*speed*5;
                     //moveDirection *= speed*5; 
                     //transform.position += new Vector3(speed * Time.deltaTime, 0.0f, 4.0f);
                     Vector3 speed = new Vector3(0, 0, 10);
                     cm.SetVelocity(new Vector3(cc.velocity.x,0,cc.velocity.z));
             }

This is what i found for now but its not working