I don't mind a little chitchat if the person is responsive. I had one guy say "hi, can I ask you a question?" I responded within 30 seconds. The guy disappears

I don't mind a little chitchat if the person is responsive. I had one guy say "hi, can I ask you a question?" I responded within 30 seconds. The guy disappears and isn't heard from for 14+ hours. Kinda annoying.