Update app.py

app.py

@@ -47,8 +47,7 @@ def get_vectorstore(text_chunks):
     return vectorstore
 
 def get_conversation_chain(vectorstore):
-    # llm = ChatOpenAI()
-    llm = 
+    llm = ChatOpenAI()
     memory = ConversationBufferMemory(memory_key='chat_history', return_messages=True)
     conversation_chain = ConversationalRetrievalChain.from_llm(
         llm=llm,