Okay. I'm going to try something different, which is more suited to this question. I'm using astrology to answer this question.
This is horary astrology. I don't know if you know anything about that, but if you don't, I won't bore you with the technicalities.
I would leave another message for him, and if you do that, you should hear back from him on the 10th of June, as the Moon will perfect with Mercury on that day by sextile. Mars will conjoin with Mercury in the beginning of July, so I would say that is the latest that it would occur.
You should hear back from him on the beginning of next week, however.