I'd also reply something along the lines of "thank you for the email." And depending on the relationship, I'm not sure if I'd address the "I hope you are well". If it were a professor or former employer/supervisor, I'd probably say something that I was doing (either academically or professionally), ie - I have one last year left to my doctorate and so I've been busy; or I just finished two trials so thankfully I have a moment to respond.
If it some other formal situation, I would craft a response to the way that I know that person.
If I thought that they didn't care or if they are so far removed from me that them knowing anything is out of the ordinary, I would just ignore the question.
Mix of 3s, thick, coarse, medium porosity
Current hair styling technique: rake with a scrunch at the end. (works with my coarse hair)
Known HGs: KCCC, homemade fsg, honey