We are really sorry that you are unable to reserve the requested. As I have already said, in a note dated 7. hotels are dealing with a situation where a room is fully booked out.
We are sorry not to be able to book you on request. As to inform it that the 7th day, the hotel is facing a situation where the room was fully booked out.
We're sorry really unable to book a room for you upon request. As to inform that the 7. The hotel is faced with the situation that the rooms are fully booked.