FORMAT_INSTRUCTIONS = 'Use the following format:\n\nQuestion: the input question you must answer\nThought: you should always think about what to do\nAction: the action to take, should be one of [{tool_names}]\nAction Input: the input to the action\nObservation: the result of the action\n... (
this Thought/Action/Action Input/Observation can repeat N times
)\nThought: I now know the final answer\nFinal Answer: the final answer to the original input question'