Quite a funny yet interesting mission you got there, awesome for determining the different text styles, as you said. I will try and find the directSay part ;)
edit: found all of it I guess, but does directSay require a speech file?
edit2: after removing kylania's sound lines, like the .ogg lines, i started the mission, and started the chat conversation and gave me an error like sound/greet.ogg not found, yet it continued with the other directSay lines perfectly as I wanted.. in local chat, how to get rid of the first error, so use directSay without a speech file?