In my school, we are separated in four houses, and i want to enroll for being a committee next year, so i have to prepare 2minutes (max) script in the election so students from my house will vote for me

Well,
think logically (just hear me out, I didn't mean to say it in a hostile manner)...

You want people to vote for you, so connect with them.
Perhaps think about something you did with your classmates, an event, say something about a connection that you had with everyone there and just make them laugh.  Humor always wins.
:)
good luck bud