I emailed a a past prof and asked if he would be willing to write a LOR. He responded within a day and said he'd be happy to help, so I email him back when he'd be able to meet so he can get to know me more personally and I can give him the necessary info (CV, etc). I didn't received a response within a week, so I recently emailed again, and I still haven't received a response! What should I do?? I don't want to keep on emailing him because I don't want him to get irritated and I don't know when he's in his office so I can't just find him in person. Or should I just try to find someone else to write a LOR since he doesn't seem to be responsive anymore?? I'm confused on what to do, any help is appreciated.