diff --git a/custom_components/llama_conversation/conversation.py b/custom_components/llama_conversation/conversation.py
index 6458287..a932533 100644
--- a/custom_components/llama_conversation/conversation.py
+++ b/custom_components/llama_conversation/conversation.py
@@ -421,6 +421,7 @@ async def async_process(
                 response=intent_response, conversation_id=conversation_id
             )
 
+        tool_response = None
         # parse response
         to_say = service_call_pattern.sub("", response.strip())
         for block in service_call_pattern.findall(response.strip()):