Hmm, good point, that would work, thanky you, but unfortunately MM only has 4 seats available (DXB>IST>VIE), so my plan is to book 4 pieces on MM and the 5th piece on TK, as it seems that TK has more award seats available.... Is it possible to book 4 in C and 1 one in Eco under a single reservation with MM? That would give me flexibility and in the worst case, cancel the eco seat and book C on TK late. Thanks