How to setup camera look at mouse on right click

I have a script started to get my camera location and me mouse location on the terrain but I am not sure how to make the camera look at the mouse when i right click any ideas on how I would do this smoothly so the camera pans over to center on what you clicked?

 function Update () {
 
     var hit : RaycastHit;
      
     if(Input.GetMouseButton(1)) {
         var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         if(Physics.Raycast(ray, hit))
         Debug.Log("Mouse Location " + hit.point);
         Debug.Log("camera Location " + Camera.mainCamera.gameObject.transform.position);
     }
 }