Travelers in the United States are used to tipping a multitude of people, from the baristas who make their frothy coffee concoctions to restaurant servers, parking valets, hotel housekeepers and Uber drivers.
원문출처 : https://www.cnn.com/travel/article/tipping-flight-attendants/index.html
원문출처 : https://www.cnn.com/travel/article/tipping-flight-attendants/index.html