Any one have experience with dialogues like in classic RPG games??

Where to start to make advanced dialogue system for cRPG games?

I mean on upper Text NPC message and on lower Text / Texts player choose message

What exactly are you having trouble with? It's not much different than any other clickable interactable object.

If dialogue is waiting for response

On 1 clicked, do something

On 2 clicked, do something

On 3 clicked, do something

On 4 clicked, do something

Although for most classic rpgs, they all actually do the same thing, which is to advance the dialogue anyway.

I use the layout to store the whole conversation and a layer that I enable for input and disable the other lower layers. I move the text on and off the non scrolling layer with x -20000 being off. I have the text go bold if it can be clicked. All in all it has not been very easy to do a real dialogue. Some people say do it all in html. This is just my 2 cents.

JSON is a suitable format for storing dialogue. You've got a lot of options here though so use whatever you're comfortable with. You could even store it in instance variables per npc if you want.

I'd use multiple instances of a text object for clickable responses. I'd use a separate text object for non interactive text though.

Guys but where i should start, i found somewhere on forum examples?

its possible to add to project .txt file with lines of text

and display randomly in game?

Yes it is but add AJAX first to retrieve string from imported txt file.