text: Action: the action to take, should be one of {tools}
  Action Input: the input to the action, always a simple string input
  Observation: the result of the actionIf the result of the action is "I don't know." or "Sorry I don't know", then you have to say that to the user as described in the next sentence.When you have a response to say to the Human, or if you do not need to use a tool, or if tool did not help, you MUST use the format:Thought: Do I need to use a tool? No