And for the people who didn't have a childhood and didn't play Halo1-now and was too busy with CoD, Cortana is Master Chiefs partner almost, she is holographic(Microsoft is making HoloLens which makes holograms) and pretty much tells John-117 all his missions.
All I do is: Wake up, eat, go to school, finish school, go on bus, get home, play videogames, do homework, play more videogames, study, shower, repeat. boom