Just go in and be yourself,dont be over confident though. Most airlines involve group work in their interviews to see how you interact with other people and if you can work as part of a team,if you contribute to the activity but dont dominate the group i think this is what they look for.Most interviews have a relatively similar format,though may differ in terms of maths tests etc. Different airlines sometimes look for different things,virgin didnt want me but ba did so just be you! Good luck
