What is the cause of imaginary dialogues in mind? Most of the time, I have conversations in mind. Most of them, there is person , interviewing me. Other person: "Why don't you like that ?" Me: "I don't like it because ..."

This doesn't happen in real world because it is an egoish thing. What is the cause of this ?. Is this the pride ? How do I stop this without forcing it ? (I'm aware of these kind of thoughts and I turn the direction when I caught them.)

I am looking for an answer according to the Buddhism.
It's about the first Governor arguing with the defilement or vici versa. Nothing wrong and very needed till the final abounding of even this relation. Just don't mix them, since the defilement are smart in tricking.

[Note that this isn't given for stacks, exchange, trade or what ever keeps one bond in the wheel]