<h1>reserver</h1>
<form action="" method ="post">
   <input type="text" name="seat">
   <input type="text" name="type">
   <input type="text" name="quantity">
   <input type="submit">
</form>

class reservationController extends Controller
{
    public function CreateReservationtAction(String seat ,String type ,String Quantity){
        //code to insert into database
        return $this->render("pages/reserver.html.twig");
       }
}

techevent_reservation:
    path:     /res
    defaults: { _controller: techeventBundle:reservation:CreateReservation }