Dear customer The hotel apologizes for any inconvenience during your stay. Initially, the hotel receives the customer's information regarding a reservation for a Standard Double room, which is the booking information that the hotel receives from the customer's booking channel. The hotel is therefore unable to provide Standard Twin because 1. The double bed room is full. 2. My child's reservation is for a single bed. In the case that the Standard Twin room is full, but the customer requests a double bed room, the hotel is unable to provide a double bed room to the customer by relying on the customer's Standard Double room reservation. However, in the next booking, the customer can choose Reservations for a double room under the name Standard Twin and through your reservation system will be sent to the hotel. I would like to apologize for the hotel's service. The hotel will use it to improve the staff next time.