Training Seminar

One legal firm located at Pune has organised seminar at Indore M. P in a Hotel.. I had attended seminar personally and paid fee Rs. 3000. my query is that in case of personally paid fee, what tax will be charged by legal from from me CGST, SGST or IGST? second if I attended program on behalf of my working company and fee paid by company then what tax will be charged by legal firm on their bill?