Ad campaign: Customer satisfaction

A service organization is looking for an image of a satisfied person to use in an upcoming ad campaign. No, we don't have much to go on with this, but the requirements are not difficult and this sort of image is used time and time again in so many campaigns. The client wants an image of an attractive adult, either looking directly into the camera or just slightly to the side (they have admitted that a person with closed eyes MIGHT be acceptable). The person must have an appearance of confidence or satisfaction. They have a preference for smiles, but that is not a strict requirement. In order to work with their campaign strategy, the subject can be no smaller than a 3/4 length portrait but can be as close as a tightly cropped face.