dialogue in doom builder 2?

[edemus]

how to make dialogue in doom builder 2?

[Gez]

Well, the first question is what do you mean exactly by dialogue?

The only Doom engine game with conversations in its vanilla format is Strife. However, vanilla Strife conversations are not feasible with Doom Builder alone because you will need a special tool to compile the conversation scripts.

There are several conversation engines that were written for ZDoom's enhanced ACS. If that's the way you want to go, you'll edit the dialogue by editing ACS.

Finally there's a generalization of Strife's conversation system that can be scripted with USDF or ZSDF.
http://zdoom.org/wiki/Universal_Strife_Dialog_Format
http://zdoom.org/wiki/ZDoom_Strife_Dialog_Format