Yeah, it does that. I can modify ChatGPT behavior through the system message, which should change the personality and response type in the final data. I could maybe start training it with examples on how it should act when the system message is present.

Example:

### System:{Act as a best friend}

### Instruction:{hi}### Input:{noinput}### Response: Hey there! What's up? How's your day going?

I could feed the model with thousands of examples like this which would result in complete personality change if the system message is present