Service tax on air travel agent

Sudhir Soni Finance & Taxation   27 If we opt Compositon scheme of Air Travel Agent service tax there is Option to pay service tax at flat rate on ‘basic fare’ @ 0.7% in case of domestic booking and 1.4% in case of international booking – plus education cess and there is No restriction on availment of Cenvat credit also under rule 6(7) of STR But my query is that if we charge extra service charges (other than commission received from airlines) from customer on that ticket then we charge service tax also on the same or not ?