She seems vague

She's walking on a busy upscale street by herself. She looks around... at the scene, at the people, at the surroundings. She smiles. Sometimes she has a snob, stern, serious expression on her face. She stops when something caught her attention. But she just walks and looks around and walks and goes around. What is she thinking? What is running through her mind? She looks down the ground, she looks up to the sky, she looks far beyond the horizon... far beyond the street as if searching for someone or something. She walks faster, then slows down, then faster, then slows down again. Where is she heading to? She gets inside the stores and checks some stuff, like she has so much interest in it but only for the first few seconds and realized she doesn't need them and then leaves.