diff --git a/autogen/agentchat/conversable_agent.py b/autogen/agentchat/conversable_agent.py
index 04c04f471f..0e950e190f 100644
--- a/autogen/agentchat/conversable_agent.py
+++ b/autogen/agentchat/conversable_agent.py
@@ -2179,7 +2179,12 @@ def check_termination_and_human_reply(
             config = self
         if messages is None:
             messages = self._oai_messages[sender] if sender else []
+
+        # if there are no messages, continue the conversation
+        if not messages:
+            return False, None
         message = messages[-1]
+
         reply = ""
         no_human_input_msg = ""
         sender_name = "the sender" if sender is None else sender.name