Hi everyone, I recently startted working on @cold-motherboard-82208 . Some of the issues I am facing are: 1. How can I ensure that bot always response in a specific structure with specified fileds such that even if some value is not retrieved or accessed ghen that field can be none but the res[onse should be in required structure. 2. In file extraction part how to ensure that file content stored in a variable does not get overriden by nw file's content. 3. Can I set values of variables like user variables or conversation variables in the hook or not?