When you are discussing something with someone especially over chat
and have written say around 10 sentences there. And now suddenly you want to mention or talk about something else. I feel it's not a good idea to simply ping a piece of next 10 lines which have no connection with the earlier 10 lines.
What should be sandviched in between? Should I write separate topic before beginning to write the other 10 lines or is there some other better way to begin writing about different topic?