In this industry, you never want to do what I call give a hum. A hum is a false promise or expectation. For example, telling a candidate that there is a good chance that she will get an interview when you as a recruiter really do not know if the chances of them getting an interview. Or telling a client that there is a good chance we can find a candidate for you when you know that the chances of finding a candidate are very slim. I think most people would rather hear the truth of how you feel, the truth of their chances, and your real opinion of their expectations then hear something that they later find out was untrue or deceiving in someway. My experience says, that if you humming someone in this industry is one of the worse things you can do and is a great way to destroy a relationship.