There are two things that you can touch upon as an answer to this question. The first relates to the statistics regarding the sector. Tell your interviewers that it is a dynamic sector that is growing at a rapid pace and you want to be in the middle of the boom, the excitement and the energy. However, before saying so, make sure that you have the required data to support your claims. What is the growth rate of the industry? What is the size of the industry? When did the boom start? Who says there is a boom? Basically, doing your homework well is advised. The other aspect that you should always touch upon as an answer to this question is how you and your personality are well suited to this sector. Convince the interviewers that you are made for the industry and the industry is made for you. Talking about basic traits like people skills, patience, ability to work under pressure etc, which are prerequisites to succeeding in the hospitality and tourism sector and how you excel at all these, should constitute a good answer.