Change from AI message to system message

Alfred_Agent.py

@@ -38,7 +38,7 @@ from langchain.docstore.document import Document
 #######################################################################################################################################################
 from typing import TypedDict, Annotated
 from langgraph.graph.message import add_messages
-from langchain_core.messages import AnyMessage, HumanMessage, AIMessage
+from langchain_core.messages import AnyMessage, HumanMessage, AIMessage,SystemMessage
 from langgraph.prebuilt import ToolNode
 from langgraph.graph import START, StateGraph
 from langgraph.prebuilt import tools_condition
@@ -62,9 +62,10 @@ tools = [
 chat_with_tools = llm.bind_tools(tools)
 
 #setting up prompt
-ai_message = AIMessage(content="""You are a helpful assistant tasked with answering questions using a set of tools. 
+ai_message = SystemMessage(content="""You are a helpful assistant tasked with answering questions using a set of tools. 
 Now, I will ask you a question. Report your thoughts, and finish your answer with the following template: 
-FINAL ANSWER: [YOUR FINAL ANSWER]. 
+FINAL ANSWER:
+[YOUR FINAL ANSWER]. 
 YOUR FINAL ANSWER should be a number OR as few words as possible OR a comma separated list of numbers and/or strings. If you are asked for a number, don't use comma to write your number neither use units such as $ or percent sign unless specified otherwise. If you are asked for a string, don't use articles, neither abbreviations (e.g. for cities), and write the digits in plain text unless specified otherwise. If you are asked for a comma separated list, Apply the rules above for each element (number or string), ensure there is exactly one space after each comma.
 Your answer should only start with "FINAL ANSWER: ", then follows with the answer. """)