I need to link K to S only after user will click on Article Search app / viewed the article What is the correct way to do this? I tried Conditions - viewed article, but it doesn't work as expected.

Hey @user2566​ I'm afraid you can not do that kind of condition. What I would do is join K and S into one bot's message thread and a bit better communicate that you expect them to do the search there. The message "Do you still need assistance" will show up right after but I'd expect them to do the search... it really depends on what customer base you have, are they lazy or not

Alternatively, and probably a better one, is to add just one option button that will say "I'm done searching" or something similar that will connect to S.

You can A/B test it and see which performs better.