Clases Customer, Room e interfaz de pago PaymentMethod

BookingService.php

<?php
declare(strict_types=1);

class Customer
{
    public function __construct(
        public string $name,
        public string $email
    ) {}
}

class Room
{
    public function __construct(
        public string $name,
        private float $pricePerNight
    ) {}

    public function price(): float
    {
        return $this->pricePerNight;
    }
}

interface PaymentMethod
{
    public function pay(float $amount): string;
}

class CardPayment implements PaymentMethod
{
    public function pay(float $amount): string
    {
        return "Pago con tarjeta aprobado";
    }
}

class QrPayment implements PaymentMethod
{
    public function pay(float $amount): string
    {
        return "Pago con QR aprobado";
    }
}