Is there any software by which a person can talk to himself in chat conversation style GUI?

Yes. It’s called a mirror.

Or just talk to yourself, or get a doll to talk with. Works the same.

I don’t guarantee you will solve your problems, though.

ELIZA will see you now.

Heh, interesting. Although it’s quite formulaic and repetitive.
But it’s funny.

The basic routine is quite old now and very simple. All it does is take what you say and turn it into a question, although in blind trials, where the subject didn’t know if they were talking to a therapist or the computer most people found talking to the computer more beneficial than their psychiatrist.

There are more of these btw: https://en.wikipedia.org/wiki/Natural_language_processing

I am not sure what you would want the program to do. I have had some success in opening a Word document to have a conversation with myself. I would write down possible solutions to a problem and then write down possible difficulties and then write down possible workarounds and on and on.

@LostInParadise I want something like this but for Windows:
https://play.google.com/store/apps/details?id=f.industries.fakemessages

ELIZA is a non AI bot. Starts looking super fake after a few messages.

@anonxd It was a prototype, or a first program of that sort, not sure. Some bugs are a given. There are many more similar softwares too, I’m sure many of them are more advanced then ELIZA.