diff --git a/lang_agent/components/conv_store.py b/lang_agent/components/conv_store.py
index 486e5ba..e17a20a 100644
--- a/lang_agent/components/conv_store.py
+++ b/lang_agent/components/conv_store.py
@@ -4,6 +4,7 @@ from typing import List, Dict, Union
 from enum import Enum
 import os
 from loguru import logger
+from abc import ABC, abstractmethod
 
 from langchain_core.messages import HumanMessage, AIMessage, ToolMessage, SystemMessage, BaseMessage
 
@@ -13,7 +14,13 @@ class MessageType(str, Enum):
     AI = "ai"
     TOOL = "tool"
 
-class ConversationStore:
+
+class BaseConvStore(ABC):
+    @abstractmethod
+    def record_message_list(self, conv_id:str, inp:List[BaseMessage], pipeline_id:str=None):
+        pass
+
+class ConversationStore(BaseConvStore):
     def __init__(self):
         conn_str = os.environ.get("CONN_STR")
         if conn_str is None:
@@ -64,7 +71,7 @@ class ConversationStore:
                 """, (conversation_id,))
                 return cur.fetchall()
     
-    def record_message_list(self, conv_id:str, inp:List[BaseMessage]):
+    def record_message_list(self, conv_id:str, inp:List[BaseMessage], pipeline_id:str=None):
         inp = [e for e in inp if not isinstance(e, SystemMessage)]
         curr_len = self.get_conv_number(conv_id)
         to_add_msg = inp[curr_len:]
@@ -89,11 +96,11 @@ class ConversationStore:
             raise ValueError(f"Unknown message type: {type(msg)}")
 
 
-class ConversationPrinter:
+class ConversationPrinter(BaseConvStore):
     def __init__(self):
         self.id_dic = {}
     
-    def record_message_list(self, conv_id:str, inp:List[BaseMessage]):
+    def record_message_list(self, conv_id:str, inp:List[BaseMessage], pipeline_id:str=None):
         inp = [e for e in inp if not isinstance(e, SystemMessage)]
         curr_len = self.id_dic.get(conv_id, 0)
         to_print_msg = inp[curr_len:]