The other day I went to a restaurant and met a girl. She was also a customer. She was with other two girls. She smiled to me as if she knew me. I smiled back. I felt that I saw her somewhere before, but I couldn't remember. Until a moment ago, I suddenly recalled that she was one of my contacts on my mobile phone app. We chatted on the app before I stumbled upon her in the restaurant. Now my question, I can chat with her on the app, what can I say to her? How can I game her?