There are times when the chat room is quite lively, or perhaps another channel is busy, when people come in they are not immediately acknowledged. I know I do this sometimes, even to people whom I consider friends in #Chat - we all get distracted sometimes.
If that happens to anyone, my advice would be to sit tight and wait for the roar to die down, as it invariably does, then speak up. Or, if you don't have time for that, just come back later. Switching to another, quieter channel might be a strategy to try too - when someone joins another channel, the chat's bot will announce it in the main channel and if there are any ops around, they will go to the channel in question and talk to you.
There are times when #chat is quite dead, without operator coverage or active chatters. There's nothing we can do to about the chat getting quiet but we can improve operator coverage by volunteering to help the chat staff. Good staff people are always welcome!
hugs & smiles
Emelye