Looking for a movie that was in maybe 2000s sometime ago. The movie takes place in a tall hotel. The movie was a crime movie that took different characters point of view. I remember one character that was an assassin or the shooter and he was smoking and trying to numb his vocal chords to sound like someone he is supposed to become in order to do his job.

It sounds like a heist movie like the Oceans 11 films because of the different characters that appear but it wasn’t any of those movies.