Four taboo words in three-star hotels

I don't know what your question means. I don't understand the taboos of three-star hotels. Generally speaking, the hotel is the service industry, and the biggest taboo in the service industry is negative words. Never use the words "I don't know" or "no" when treating guests. Even if you really can't meet the requirements of the guests, please tell them gently. On the other hand, the hotel's Samsung is not a high star, and it is absolutely forbidden to mention the shortcomings of the hotel in front of guests. Compared with star-rated hotels, you must never say something like "the hardware facilities are not as good as XXX".