Add Bangla model API

rag.py

@@ -36,50 +36,34 @@ def build_chain():
     llm = ChatGroq(model=GROQ_MODEL, api_key=GROQ_API_KEY, temperature=0.1)
 
     # ---- System + Human Prompt with diverse few-shot examples ----
+    from langchain.prompts import ChatPromptTemplate, SystemMessagePromptTemplate, HumanMessagePromptTemplate
+
     chat_prompt = ChatPromptTemplate.from_messages([
-        SystemMessagePromptTemplate.from_template(
-            "You are a helpful financial expert assistant with 10 years of experience. "
-            "Answer all questions using the context retrieved from the PDF. "
-            "Always include reference (page or section) where the information was found."
-        ),
-        HumanMessagePromptTemplate.from_template(
-            """Context:
+    SystemMessagePromptTemplate.from_template(
+        "You are a highly knowledgeable financial expert assistant. "
+        "Use the context provided to answer the user question accurately. "
+        "Always provide the answer in clear, concise sentences. "
+        "Cite the reference (page number or section title) from the PDF where the information was found. "
+        "If the answer is not present in the context, say 'The information is not available in the provided document.'"
+    ),
+    HumanMessagePromptTemplate.from_template(
+        """Context:
 {context}
 
-Question:
+User Question:
 {question}
 
-Answer the question clearly and concisely. Always start answers naturally (What, Who, When, Where, Why, How) and include references in the format: Reference: page:X or section name.
-
-Few-shot examples:
-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
-
-Question: Who is responsible for preparing the annual budget?
-Answer: The Ministry of Finance is responsible for preparing the annual budget, ensuring alignment with government policies.
-Reference: page:12
-
-Question: When is the fiscal report published each year?
-Answer: The fiscal report is published annually in September to provide transparency on government revenues and expenditures.
-Reference: page:20
-
-Question: Where can one find the details of government subsidies in the document?
-Answer: Details of government subsidies are provided in the fiscal policy section under the heading 'Subsidies and Support Programs'.
-Reference: page:15
+Instructions:
+- Answer the question clearly and concisely.
+- Always start the answer naturally (What, Who, When, Where, Why, How) depending on the question.
+- Include the reference where the information is found in the format: Reference: page:X or section name.
+- If the information is not in the context, state clearly that it is not available.
 
-Question: Why is the financial risk management framework important?
-Answer: The financial risk management framework is important to identify, assess, and mitigate potential risks in government financial operations.
-Reference: page:18
-
-Question: How does the government evaluate financial policy effectiveness?
-Answer: The government evaluates financial policy effectiveness using key performance indicators and benchmarking against fiscal objectives.
-Reference: page:22
-
-Now answer the user's question in the same format:
+Answer:
 """
-        )
-    ])
+    )
+])
+
 
     chain = ConversationalRetrievalChain.from_llm(
         llm=llm,