Anita: Hi, long time no speak! I have a quick question - do you still teach Swedish?
Robert: Hi there, no, I haven't done it for a very long time now. Why?
Anita: My old students came back to me asking if I can teach them now.
Robert: I'm afraid I can't help because I have really little free time...
Anita: Sure, I'll maybe ask Percy then! 
Robert: Good luck and thanks for asking! 
Robert won't teach Anita's old student Swedish, because he has no time. Anita will ask Percy if he could.