Sh.Deepak Gulati Ji,
You may call whatever you like. You say it is not commission; it is purchase and sale. O.K.You may be doing so but What I understand you are performing under mentioned activity also. I am not cock sure I am presuming this from the language of your question. You are to confirm whether I am right or not. After your reply, I would post another reply. Suppose Your tour-operator is 'A', Client (passenger/service receiver) is, 'B' You are,' C' and Hotel owner is, 'D'.
A passes on B to C and A gets ₹ 2000/- from you.And C further passes on B to D for hotel accommodation and you get ₹ 4000/- from D. Is it true or not ? If 'yes', your activity is covered under erstwhile BAS (Now 'intermediary' under other than negative list) as advised by Sh.Rajagopalan Ranganathan, Sir. If you say 'no', more details are required.
If you say 'yes', Not only you, A is also covered under BAS. The activity of Passing on client/passenger cannot be called tour operator service or travel agent service. What are facts I do not know.