Vesicles have spheroid structures composed of bilayers of amphiphilic molecules and widely used as models of cell membranes and as carriers for controlled drug delivery. Mixtures of cationic and anionic surfactants offer an attractive route to prepare vesicular structures. Recently a vesicle comprising SDS and CTAB molecules showed temperature induced multi to unilamellar transition. Moreover the vesicles possess lamellar order with close packing of chains, which vanishes above transition temperature, similar to chain melting transition in lipids. The transition could be driven by various factors like entropic, osmotic and local interaction, which can be probed suitably by quasielastic neutron scattering (QENS) technique. The aim of the proposed experiment is thus to carry out high resolution QENS study in SDS/CTAB vesicles to unravel the existing complex dynamical landscape.