Hello, Clarice.
This line, while occasionally used in parody of the film The Silence of the Lambs, was never once used in the film itself. However, Anthony Hopkins's character, Hannibal Lecter, does at one point utter a similar phrase of "Good evening, Clarice." On the other hand in the sequel Hannibal, when the doctor answers detective Pazzi's cell phone, just before he pushes him off the library balcony, Dr. Lecter greets Agent Starling with the following, "Is this Clarice? Well, hello Clarice..."