subash, hospitality is a very wide domain. From front office to catering, it has a range of entry points and different qualitifications that will give you an opening. 

As a graduate, you could still go back and do a diploma from IHM, the hotel management institution chain set up by GOI. But you will have no credit for your B.Com. And one also has to see if you fall within that age group. 

Alternatively you could look at B-Schools which offer Hospitality as a specialisation. But most instituions would have travel and tourism as a core domain. Many universiites like Amity, SRM, Hindustan and others offer MBAs with specialistion in hospitality managment.