How to automatic slug when i press the submit button

I want to create slug by using value of $item->name = $request->input('name'); before $item->save();

//use Illuminate\Support\Str;

 private function saveItem(Request $request, $item){
    $item->name = $request->input('name');
    $item->slug = Str::title($item->name,"-");


    $item->save();
  }

When the $item->name = $request->input('name') value is Hello World,

Then after slug the output will be Hello-World

Please help.

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