PSA: When you ask "Can I go [position] and you don't get an answer, it means "No."
People are not required to answer you. People might be alt-tabbed until its their turn to pick. People might not want to talk. People might not speak your language.
So after you asked one time, stop asking. If you don't, you are just painting a picture of being a pathetic one-trick pony, who can't play any position but the one he wants.
Plus, you are annoying.
Oh, and if you take silence as confirmation, and steal the role, enjoy your ban, because people will report you.