If I send him something between sessions he'll normally respond to say he's received it but won't generally comment on the content, preferring to save that for session. If I needed an extra session I know he would try to accommodate me, but he might not be able to as he has a very full schedule. That said I once phoned him at 2pm and asked if I could see him that day, and he saw me at 4pm. So he will when he can. I can rely on him to do his best.