This is my first post.
Background: I applied for further studies, to one of collaborators lab and he replied with a very positive e-mail, asking about time to talk on phone. But after that I never received e-mail from him, so I am following up.
I am starting my response like this:
I am sure you are very busy, but I didn’t hear back from you about the convenient time to further discuss xxx position in your lab.
But I am not sure if:
1) I can add "about ...." after "I didn't hear back from you"? and
2) if its rude to mention that I haven't heard from you?
Your responses will help me use "didn't hear" correctly in future.