How to get the post id in laravel

Am trying to update a record in my database using an update button that is linked to a page where the update form is located but each time I click on the button, I get a 404 error (I think maybe the problem is that the page could not read the id of the requested post).

This is my route

Route::get('/pages/update/{id}','CallsController@edit');
Route::post('/pages/update/{id}','CallsController@update');

My CallsController

public function edit($id)
    {
        // $calls = Call::where('user_id', auth()->user()->id)->where('id', $id)->first();
        // return view('pages.assignCall', compact('calls', 'id'));

        $calls = Call::find($id);
        return view('pages.assignCall')->with('calls', $calls);
    }

public function update(Request $request, $id)
    {
        $calls = new Call();
        $data = $this->validate($request, [
            'call_details'=>'required',
        ]);
        $data['id'] = $id;
        $calls->updateCall($data);

        return redirect('pages.pendingCalls');
    }

I also have update.blade.php in the pages folder inside my views.

This is my update button

<a href="{{asset('/pages/update')}}>update</a>