LittleStain is correct, using separate text objects is hogging system resources for no reason.
I would recommend creating a dialogue box, then move that box off-screen or set it to invisible. Then when you want dialogue, have a function that sets the dialogue box to visible, repositions it to X, Y and sets its text (using function parameters). This way you can have one dialogue box work for all dialogue cases that can be shown and hidden on demand.
Again, I would recommend downloading my .capx to see exactly what I mean.