help about chat_600_k_2_43x bots

I am using "chat_600_k_2_43x" with my John CMS 4.4 , chat works fine..
But the problem is , Chatbots don't work the way it should.
I tried to add many phrases , but they always give wrong results .
Please someone give a few examples to setup these bots.
For example , when we create a new chat bot , what does these mean ?
[text] - question/phrase
[text_count] - Number of characters answer

If I want to add a simple chatbot which chats like a human , what should I do ?

please help

I hope the author of this mod knows everithing) ask him for a help) I didnt try to add bots Thats why I know nothing about the problem))

One request should be enough to create a simple bot. It will chat randomly, for example can add pre-prepared jokes. One string in the top of script.

if (rand(0, 5) == 5) {
mysql_query("INSERT INTO `your_chat_room` SET `text`='YOUR CHOSED JOKE', `author`='YOUR BOTNAME'");
}

This is for example, I just do not know the structure of the
table and field names in it.