An employee has just completed all the tasks his boss gave him, and his colleague is asking him (as he was pretty fast in completing them even before deadline) :
A: "Why are you having such a long break, not doing anything and still in the office?"
B: "I have completed all the tasks our boss gave me and I have nothing to do for now."
It's true that there is no other task left his boss assigned him), but is it appropriate to say that in the office? Is it better to say something like this
I have completed all the tasks ... I am thinking about the plan for next project.