Update app1.py

app1.py

@@ -37,7 +37,7 @@ def get_vectorstore(text_chunks):
 
 
 def get_conversation_chain(vectorstore):
-    llm = HuggingFaceHub(repo_id="lmsys/vicuna-7b-v1.5", model_kwargs={"temperature":0.2, "max_length":1024})
+    llm = HuggingFaceHub(repo_id="google/flan-t5-xxl", model_kwargs={"temperature":0.2, "max_length":1024})
 
     memory = ConversationBufferMemory(
         memory_key='chat_history', return_messages=True)