You shouldn't bother people when they are working.
Jon is struggling with a project he has been assigned to at work.
Jon wants to ask a coworker to help.
Jon waits until a coworker is on break to ask for help.
Jon asks a coworker who is busy working on another task.
Jon's coworker feels like he can mentor people at work boosting his confidence.
Jon's coworker's performance has been slowed down.