Update app.py

app.py

@@ -116,11 +116,18 @@ def send_twilio_message(client, conversation_sid, body):
 def get_latest_whatsapp_conversation_sid(client):
     conversations = client.conversations.v1.conversations.list(limit=20)
     for convo in conversations:
-        if convo.chat_service_sid and "whatsapp" in convo.friendly_name.lower():
-            return convo.sid
-    # fallback to the first available conversation
+        try:
+            participants = client.conversations.v1.conversations(convo.sid).participants.list()
+            for p in participants:
+                if p.identity and p.identity.startswith("whatsapp:"):
+                    return convo.sid
+                if p.messaging_binding and p.messaging_binding.get("address", "").startswith("whatsapp:"):
+                    return convo.sid
+        except Exception as e:
+            continue
     return conversations[0].sid if conversations else None
 
+
 # Streamlit UI
 st.set_page_config(page_title="Quasa – A Smart WhatsApp Chatbot", layout="wide")
 st.title("📱 Quasa – A Smart WhatsApp Chatbot")