yeah, best for that (for anyone else who wants to know) is to say weaknesses that are sort-of strengths, like, "sometimes I get really worked up about fine details, but I find its useful helping me perfect my work." or "Sometimes I find myself talking to people a lot, but its good because knowing your colleagues better helps us to work as a team." Anyway, good luck, hopefully the phonecall will come soon, and it will be a yes (of course!)