I'm pretty certain the model you depicted was a different person, but she REALLY gives off an "Audrey Hepburn" vibe in my opinion. That sweet smile, those gorgeous eyes; they contribute to an overall beautiful portrait.
What I also gotta enjoy is the thoughtful pose that really makes the viewer ponder just what the subject is thinking. The other little details like the necklace, earrings and headpiece also add much to the subject's beauty and mystery.
Your skinning looks very solid and the lighting is done just right, adding well to the atmosphere. The setting could be ambiguous; she could be in a cafe over a coffee or sweltering with class in a fierce desert... Either way, a splendid piece of work and one that deserves my stamp of "Honorary Class" inductee, whatever that means to you. Excellent work, Amro!