Hello, I would like to test a multi-turn conversation between an assistant and a simulated user. The prescribed conversation flow of the assistant is very long and for my current test cases I just need to test the end of the conversation. For these tests, the previous messages are very important, so the simulated user and the assistant need to know what "they" said before. I saw in the docs, that there is an option of adding a variable "messages" or "_conversation", but I don't know how this is behaving with the simulated user provider. Is it possible the define the previous messages for both the assistant and the simulated user, so they know where to continue the conversation? And how can I do this?