Thursday
PM: Hey why is A delayed? It should be top priority.
me: I just completed B, and C which were also top priority but got scheduled earlier, so I thought they..
PM: Agh, yes. But can you then finish A by the end of week? it would be very important!
me: No, I unfortunately don't think I'd have enough time by the end of wee..
PM: Why? This should be *the* top priority task. You should not start other tickets before A is done.
me: Exactly. But I *just* started. And. I. don't. have. enough. free. hours. left. this. week.
PM: But why?!
me: So just on Friday I have these 5 meetings here..
*shows calendar*
PM: Ok... OK! Then don't attend those before you are done. This should be more important.
me: Ugh, oh-key...are you sure?
PM: Yea, just let who invited you know that you can't attend and feel free to cc me in, I'll explain A is most important atm.
me: Ok, thanks, but that won't be necessary.
PM: What? Why?
me: You invited me to the Friday meetings.

Obviously I had to attend all 5 meetings today and A is pushed back to next week. :)