Update app.py

app.py

@@ -27,7 +27,7 @@ st.markdown(custom_css, unsafe_allow_html=True)
 
 # Initialize session state if it doesn't exist
 if "messages" not in st.session_state:
-    st.session_state["messages"] = [{"role": "This AI model is designed to classify skin images into specific categories: Actinic Keratoses (akiec), Basal Cell Carcinoma (bcc), Benign Keratosis (bkl), Dermatofibroma (df), Melanoma (mel), Melanocytic Nevi (nv), and Vascular Lesions (vasc). It won't recognize general skin images. Ask More?"}]
+    st.session_state["messages"] = [{"role": "assistant", "content": "This AI model is designed to classify skin images into specific categories: Actinic Keratoses (akiec), Basal Cell Carcinoma (bcc), Benign Keratosis (bkl), Dermatofibroma (df), Melanoma (mel), Melanocytic Nevi (nv), and Vascular Lesions (vasc). It won't recognize general skin images. You can ask more."}]
 
 # Define the model query function with error handling for HuggingFace
 def query_model(image_data):