laravel query room available

Dear All, According to I have 2 tables and I would like to show available room on system so I have command below for example So My question is How can I create it as eloquent for query these?

SELECT r.room_id
FROM rooms r
WHERE r.room_id NOT IN (
    SELECT b.room_id FROM bookings b
    WHERE NOT (b.end_datetime   < '2012-09-14T18:00'
               OR
               b.start_datetime > '2012-09-21T09:00'))
ORDER BY r.room_id;

Schema::create('tb_rooms', function (Blueprint $table) {
            $table->id();
            $table->string('room_name');
            $table->integer('roomtype_id');
            $table->tinyInteger('max');
            $table->double('price');
            $table->tinyInteger('status')->default(1);
            $table->timestamps();
        });

 Schema::create('tb_reservation_room', function (Blueprint $table) {
            $table->id();
            $table->integer('reservation_id');
            $table->integer('room_id');
            $table->tinyInteger('adult');
            $table->tinyInteger('child');
            $table->double('room_price');
            $table->date('checkin_date');
            $table->date('checkout_date');
            $table->timestamps();
        });