bat-8.x-1.x-dev/modules/bat_booking/bat_booking_example/bat_booking_example.routing.yml

bat_booking_example.booking:
  path: '/booking/{start_date}/{end_date}/{type_id}'
  defaults:
    _controller: '\Drupal\bat_booking_example\Controller\BatBookingExampleController::batBookingConfirmationPage'
    _title: 'Booking'
  options:
    parameters:
      start_date:
        type: bat_date
      end_date:
        type: bat_date
  requirements:
    _permission: 'book units'