We understand what you must be going through.
It is going to be a task to convince your family about the career option that you have chosen.
Its advisable that you talk to them and make them understand what the career is all about. For that you will have to be well-informed about the career and the opportunities in the field. Log on to http://www.youngbuzz.com/careers/career-options for more information about the various profiles in the industry.
We understand you parents concern too, as taking up a career in hotel industry would require you to spend long long hours out of the house and that too without fixed timings. This is a very genuine concern that any parents would have towards their daughter.
I would also ask you to think about the career test, which will help you look at the other career options available for you.
Log on to http://www.youngbuzz.com/career-assessment/role-assessment-career-counselling for more information on the test and to check out a sample report.
The test will help you know your interests,aptitudes and personality too, which will in turn help you make an informed career decision.
Hope this helps.