Also consider the chat function itself. It takes 90 minutes for a person to appear "offline" when they close the browser or move on to a different site, unless the manually log out.
It could look/feel like your request is being ignored.
The chat function is also not the most reliable thing on this site. Pretty buggy, technically speaking.
I'd go with messaging or emoting first.
I didn't know that. That explains why someone wondered why I didn't accept the chat request. It must have appeared as if I was online.