No Commas

John walked through the hall. He entered a room on his left. John walked into the empty room; he sat down at the empty desk. He waited. He sat there for quite some time before anyone arrived. From outside the hall he heard footsteps. A small man entered through the open door and motioned him to get up. John willingly got up and went towards the small man. The man told John that he needed to be wary of the other attendants on their floor. He should watch out for anyone trying to give him advice.