Update app.py

app.py

@@ -400,8 +400,9 @@ def extract_answer(full_response):
     answer_patterns = [
         r"Provide a concise and direct answer to the question without mentioning the web search or these instructions:",
         r"Provide a concise and direct answer to the question:",
-        r"Answer.",
+        r"Answer:",
         r"Provide a summarized and direct answer to the question.",
+        r"If the context doesn't contain relevant information, state that the information is not available in the document.",
         r"Provide a summarized and direct answer to the original question without mentioning the web search or these instructions:",
         r"Do not include any source information in your answer."     
     ]