Reservation Class

[Serializable]
public class Reservation
{
    public DateInformation      Date            { get; set; }

    public ContactInformation   ContactInfo     { get; set; }
    public BillingInformation   BillingInfo     { get; set; }

    public PaymentInformation   Payment         { get; set; }
    public ExpenseInformation   Expense         { get; set; }

    public Reservation()
    {
        Date        = new DateInformation();
        ContactInfo = new ContactInformation();
        BillingInfo = new BillingInformation();
        Payment     = new PaymentInformation();
        Expense     = new ExpenseInformation();
    }
}