Generally speaking, if you're horde - go to the coords to see the NPC in Valdrakken, about 54.21, 60.37.
Then do the commands as she requests as "say" functionality. (Yes, command "chat" so to speak.)
Once you get close to the NPC, she may request the first thing. Then you click your callout button add the forward slash and add the command she requests. She will ask some commands, like "kneel," so you just type /kneel in the callout and click enter.
The real thing to remember is that you see her acknowledge she received your say "call out command" with the quest as you do it.
She may ask for "/smile" and another one may be "/laugh" where you type that in the say and click enter to complete your callout.
You should see each one update the quest to indicate she has received your response. It may take 2-3 seconds, though the quest updates at that time.
If she doesn't ask for the commands, then get a little closer to her first.
Also check if you click on her, if needed, if you don't get any "commands" to type in the "say" chat.
Thanks, hope this helps.