I think a good mental model of what you can expect from a chat bot is imagining that somebody read tje bank statement to you and them asked you a bunch of questions. Could you follow that, not make smy mistakes, not forget anything? Cam you perform the task "from the top of your head", not writing anything down, not pulling up excell or a calculator? If you can there's a good chance AI will be able to do that too. The fact that it sometimes can do more is pure miracle. And if you want it to do those things consistently you need to provide it with access to the tools you'd need to perform thus task consistently.