Use the hotel phone. Hello, Mr. XX, I am the customer service specialist of XX Hotel. You stayed in our hotel on XX, during which time our hotel has presented souvenirs to the guests. I will provide you with after-sales service, which will take about 2 minutes. I'll send you a souvenir later or give you a discount next time. I'll call you back if it's inconvenient. During your stay in our hotel. ...