I like your communication style -- and I think if we have never met a person -- but only through text -- it is very important to make ourselves visible. Here are two preliminary thoughts.
1)Embody the text -- One can note one's own and others style -- through some descriptions and questions. I like to get a feel for the person and their ideas: is it grounded, centered, off center, loose, tight, verbose, humourous, gathering, zapping, etc. and are my own responses what I want to communicate. This unfortunately is a bit time consuming -- but likely shows an Emotion Intelligence (EQ) to the reader -- and emotion state is important not just the ideas.
2) What are the parameter cues in the text? Does the person have an essential immediate need, or can the message wait? Do I have the time and the inclination to answer?