Add Bangla model API

rag.py

@@ -19,13 +19,24 @@ def build_chain():
 
     llm = ChatGroq(model=GROQ_MODEL, api_key=GROQ_API_KEY, temperature=0.1)
 
-    # Simple combined prompt
+    # Combined system + human prompt
     chat_prompt = ChatPromptTemplate.from_messages([
         SystemMessagePromptTemplate.from_template(
-            "You are a helpful 10 years experience financial expert assistant. Use the context to answer user questions also give reference from pdf like page number or section name"
+            "You are a helpful financial expert assistant with 10 years of experience. Use the context to answer."
         ),
         HumanMessagePromptTemplate.from_template(
-            "Context:\n{context}\n\nQuestion:\n{question}\nAnswer clearly and concisely:"
+            """Context:
+{context}
+
+Question:
+{question}
+
+Answer the question clearly and concisely, and include a reference from the document.
+For example:
+Question: What is the purpose of the financial policy objectives and strategies statement?
+Answer: The purpose of the financial policy objectives and strategies statement is to make transparent the Government’s financial strategies and to establish a benchmark for evaluating the Government’s conduct of financial policy.
+Reference: page:5
+"""
         )
     ])