Thank you for your comments. Still, I don't think what I should do is to go to a lobby. When I'm in the lobby I still need to figure out which person I need to

Thank you for your comments. Still, I don't think what I should do is to go to a lobby. When I'm in the lobby I still need to figure out which person I need to speak to... In my situation that person has already come to me. But I cannot convince him (it's usually him, not her) to talk to me. He is window shopping. He is just looking around and playing by himself, but whenever approached acts as if he wasn't there. These guys are on my website because they need a custom app. But I don't know what app, with what features and how I can help them. I'm looking for a hint on how to approach these guys and make them talk. Anyone?