Laravel 5.4: Cannot retrieve data from a relationship

I'm trying to display the name of the assignee (foreign key from Users table) of each ticket by storing each name in an array from two UNION'd tables (Accesses and Reports) but it gives me this error. ErrorException Undefined property: stdClass::$assignee.

//HomeController
    $accesses = DB::table('accesses')
                ->select(array('id', 'fullname','emp_id','shift','state','resolved_at', 'closed_at','assigned_to'))
                ->where('state','=','Assigned');

    $all = DB::table('reports')
                ->select(array('id', 'fullname','emp_id','shift','state','resolved_at', 'closed_at','assigned_to'))
                ->union($accesses)
                ->where('state', '=', 'Assigned')
                ->get();

    $names[] = array();

    foreach ($all as $one)//store in array to display in a chart
    {
      $names[] = $one->assignee->name; //error here
    }




   //Report Model
   public function assignee()
   {
      return $this->belongsTo(User::class, 'assigned_to');
   }

   //Access Model
   public function assignee()
   {
      return $this->belongsTo(User::class, 'assigned_to');
   }

  //Report Migration
  public function up()
  {
    Schema::create('reports', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->nullable();
        $table->string('fullname');
        $table->string('emp_id');
        $table->string('shift');
        $table->longText('report');
        $table->string('status')->default('Pending'); //Pending, Approved
        $table->string('state')->default('Open'); //Open, Assigned, Resolved, Closed
        $table->date('resolved_at')->nullable();
        $table->date('closed_at')->nullable();
        $table->integer('assigned_to')->nullable();
        $table->longText('action')->nullable();
        $table->timestamps();
    });
   }

   //Access Migration
   public function up()
   {
    Schema::create('accesses', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id')->nullable();
        $table->string('fullname');
        $table->string('emp_id');
        $table->string('shift');
        $table->string('request');
        $table->longText('note')->nullable();
        $table->string('status')->default('Pending'); //Pending, Approved
        $table->string('state')->default('Open'); //Open, Assigned, Resolved, Closed
        $table->date('resolved_at')->nullable();
        $table->date('closed_at')->nullable();
        $table->integer('assigned_to')->nullable();
        $table->longText('action')->nullable();
        $table->timestamps();
    });
   }

It gives me this error

The results should be like this