In RPG maker where you would have something like (Player1)Move Right > Move Left > Text: Hello > (Player 2) Move Right > Move Left >Text : Hello. In C2, you can do the same because events run top to bottom. Processing events one at a time can be done by way of using functions, waiting for certain conditions to be met or with 'timers' and 'wait' commands.
In terms of the specific example of having NPCs walking and talking in a cutscene, I would set up destination points, when a player has walked to it, then run the next action, could be a change of movement or change in dialogue. It also depends on how you want the dialogue to update, if you want it so that the players cannot move until the dialogue has been dismissed then put in a condition Move unless Dialogue is on screen. If you want the dialogue updating as they walk and doesn't need to be dismissed then have it update when they hit certain destination points.