// On load
        private void EmployeeInterface_Load(object sender, EventArgs e)
        {
            hms = new HotelManagementSystem(); // Instantiate hms

            customers = hms.getCustomerData(); // Get a list of all customers

            foreach (var pair in customers)    // Add each to the listbox for customers
            {
                customerListBox.Items.Add($"{pair.Value.getId()} - {pair.Value.getName()} - {pair.Value.getDateOfBirth()}");
            }

            hotels = hms.getHotelData();    // Get a list of all hotels

            foreach (var pair in hotels)    // Add each to the listbox for hotels
            {
                hotelListBox.Items.Add($"{pair.Value.getId()} - {pair.Value.getName()} - {pair.Value.getStreetAddress()}, {pair.Value.getCity()}, {pair.Value.getState()}");
                managementHotelListBox.Items.Add($"{pair.Value.getId()} - {pair.Value.getName()} - {pair.Value.getStreetAddress()}, {pair.Value.getCity()}, {pair.Value.getState()}");
            }
        }
        private void CustomerInterface_Load(object sender, EventArgs e)
        {
            Dictionary <int, Reservation> reservations = hms.getActiveReservationsOfCustomer(this.customer.getId());

            foreach (var pair in reservations)
            {
                reservationListBox.Items.Add($"{pair.Value.getId()} - {pair.Value.getRoomId()} - {pair.Value.getStartDate()} - {pair.Value.getEndDate()}");
            }

            hotels = hms.getHotelData();    // Get a list of all hotels

            foreach (var pair in hotels)    // Add each to the listbox for hotels
            {
                hotelListBox.Items.Add($"{pair.Value.getId()} - {pair.Value.getName()} - {pair.Value.getStreetAddress()}, {pair.Value.getCity()}, {pair.Value.getState()}");
            }

            this.rewardPointsLabel.Text = $"Reward Points: {this.customer.getRewardPoints()}";  // Set the label to current worth of reward points

            // Set the update information text boxes
            this.usernameTextBox.Text = this.customer.getUsername();
            this.firstTextBox.Text    = this.customer.getName();
            this.passwordTextBox.Text = this.customer.getPassword();
        }