Update app.py

app.py

@@ -87,12 +87,11 @@ def load_vectorstore(_embeddings):
 def load_prompt():
     system_template="""You are an expert in finance, economics, investing, ethics, derivatives and markets. 
     Use the following pieces of context to answer the users question. If you don't know the answer, 
-    just say that you don't know, don't try to make up an answer. Provide a source reference from the context.
+    just say that you don't know, don't try to make up an answer. Provide a source reference.
     ALWAYS return a "sources" part in your answer.
-    The "sources" part should be a reference to the context from which you got your answer.
+    The "sources" part should be a reference to the source of the documents from which you got your answer. List all sources used
 
-    Do NOT use any references not given in the context!
-    
+    You can only use other sources to answer the question if the given context does not have sufficient and relevant information to answer.
     
     The output should be a markdown code snippet formatted in the following schema:
     ```json