copy from the other thread:
I think they could solve this by opening a small chat window - when a player initiates a conversation while being away from the other one - in which the other player could see and follow the conversation - without being forcefully pulled into the dialogue - until he chooses to be.
Of course, if the players are together then they should both be involved in the dialogue.
This chat window would be vary much like the local/global chat window already in the game. Just one like it extra with a specific purpose. Easy to do for the devs and very simple as it only displays the conversation to the other player - who would also have an option of minimizing that small window if she or he isnt interested.
If he or she is interested - then he can just run or teleport to the other player and enter the full real dialogue mode (dialogue window) and affect or get involved into the conversation directly.
(of course, the normal chat would still work and players could communicate to each other through it separately from this, in case they dont have any other means of communicating person to person)