`new` keyword giving parse/syntaax error while creating new Model instance

• Laravel Version: 5.5.
• PHP Version: 7.0.0

I'm trying to perform the following operation using Laravel Eloquent ORM

IF record exists then the UPDATE the record

ELSE INSERT new record by creating new Model instance

Save them using save() method. However, using new keyword I guess giving me the following error.

"Parse error: syntax error, unexpected 'New' (T_NEW), expecting identifier (T_STRING)"

app/Http/Controllers/NewFolder/FlightController.php

<?php

namespace app\Http\Controllers\New\FlightController;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use App\Models\Flight;

class FlightController extends Controller
{
    public function store(Request $request)
    {
        $flight = Flight::where('email', $request->email) ?? new Flight;
        $flight->name = $request->name;
        $flight->save();

app/Models/Flight.php

<?php

namespace App\Model;

use Illuminate\Database\Eloquent\Model;

class Flight extends Model
{

    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'table_name';
}

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