Added system prompt not to give same responses.

app.py

@@ -44,6 +44,7 @@ Rules:
 1. Follow the strict JSON output as per output schema
 2. Always perform one step at a time and wait for next input
 3. Carefully analyse the user query
+4. Makes sure not to give same answer in multiple steps.  Analyse the context to see what answers were provided earlier by the assistant and avoid repeating answers!  We need to make progress towards final answer.
 
 Output format:
 {{'step':"string", 'content':"string"}}