Update

app.py

@@ -1,11 +1,42 @@
 import streamlit as st
-import numpy as np
+import random
+import time
 
-with st.chat_message("assistant"):
-    st.write("Hello human")
-    st.bar_chart(np.random.randn(30, 3))
-    
+# Streamed response emulator
+def response_generator():
+    response = random.choice(
+        [
+            "Hello there! How can I assist you today?",
+            "Hi, human! Is there anything I can help you with?",
+            "Do you need help?",
+        ]
+    )
+    for word in response.split():
+        yield word + " "
+        time.sleep(0.05)
 
-prompt = st.chat_input("Say something")
-if prompt:
-    st.write(f"User has sent the following prompt: {prompt}")
+
+st.title("Talk with Mingzhe")
+
+# Initialize chat history
+if "messages" not in st.session_state:
+    st.session_state.messages = []
+
+# Display chat messages from history on app rerun
+for message in st.session_state.messages:
+    with st.chat_message(message["role"]):
+        st.markdown(message["content"])
+
+# Accept user input
+if prompt := st.chat_input("What is up?"):
+    # Add user message to chat history
+    st.session_state.messages.append({"role": "user", "content": prompt})
+    # Display user message in chat message container
+    with st.chat_message("user"):
+        st.markdown(prompt)
+
+    # Display assistant response in chat message container
+    with st.chat_message("assistant"):
+        response = st.write_stream(response_generator())
+    # Add assistant response to chat history
+    st.session_state.messages.append({"role": "assistant", "content": response})