Response from dropzone

I am using dropzone plugin for image and file upload.. how do I show validation errors and success message? the code is working, all i need is messages from dropzone upload..

my view:

<form action="{{ route('completeprofile.seekersubmit2') }}" method="post" class="dropzone tesst" enctype="multipart/form-data"></form>

my controller:

    public function seekersubmit2(Request $request){
        $this->validate($request,['file'=>'required|mimes:jpeg,bmp,png']);
         $image = Input::file('file');
         $file_name=time()."_".$image->getClientOriginalName();
         $path = public_path('uploads/profile_images')."/".$file_name;
         

        if(Image::make($image->getRealPath())->resize(150,150)->save($path)){
                $image_data=array(
                            'image_path'=>asset('uploads/profile_images'),
                            'image'=>$file_name,
                                );
                }
                User::where('id',Auth::user()->id)->update($image_data);
            }
    }