Nowadays, most of the sins are committed either by the eye or by the ear, yet many do not even consider such vices as evil and sinful. We consider them as trivial. Even if the situation is such that there is a very remote chance of any lustful feeling then too refrain from it.
Many people have receptionists and female attendants. We have to be extremely careful when coming in contact with them. There should be no type of seclusion with them whatsoever or casual talk.