The hotel called the guests and explained that there were no rooms due to engineering problems.

What you want to ask is what if the hotel calls the guest to explain the engineering problem and there is no room? In this case, the steps are as follows:

1. Call the guest immediately: First of all, you need to call the guest immediately and tell the hotel that there are no vacancies due to engineering problems. When notifying the guests, apologize to them and express the inconvenience caused to them.

2. Provide alternatives: While notifying the guests, you can provide alternatives, such as arranging guests to stay in other hotels or providing other room types.