1. Center for Applied Informatics, Victoria University, Vic 3011, Australia
2. Faculty of International Tourism and Management, City University of Macau, Macau
3. Department of Hospitality and Service Management, School of Business, Sun Yat-sen University, 510275, China
4. School of Information Technology, Deakin University, Vic 3125, Australia
5. School of Hotel & Tourism Management, The Hong Kong Polytechnic University, Kowloon, Hong Kong