Update app.py

app.py

@@ -11,8 +11,8 @@ def load_resources():
     embedder = SentenceTransformer('sentence-transformers/all-MiniLM-L6-v2')
     chat_gen = pipeline(
         'text2text-generation',
-        model='microsoft/phi-2',
-        tokenizer='microsoft/phi-2',
+        model='google/flan-t5-base',
+        tokenizer='google/flan-t5-base',
         device=-1,
         # enforce deterministic decoding and low temperature to reduce hallucinations
         do_sample=False,