[color=gold]Hey, [@xXSINXx],[/color]
You don't form parties while off quest . Your parties will be based on who accepts the quests first .
For example, say a quest is posted by Manish Man that has a two person party .
Now, say that Slendy accepts the quest as Noel . 
Then you accept the quest as Ava .
Your party for this quest now consists of Noel and Ava .