diff --git a/README.md b/README.md
index ad9065ec9..227ef5601 100644
--- a/README.md
+++ b/README.md
@@ -202,7 +202,7 @@ To simplify the construction of agents communication, AgentScope provides two he
     ```python
     from agentscope.pipelines.functional import sequentialpipeline
 
-    x3 = sequentialpipeline(operators=[agent1, agent2, agent3], x=input_msg)
+    x3 = sequentialpipeline([agent1, agent2, agent3], x=input_msg)
     ```
 
 - **MsgHub**: To achieve a group conversation, AgentScope provides message hub.
@@ -213,7 +213,7 @@ To simplify the construction of agents communication, AgentScope provides two he
     agent2.observe(x1)  # The message x1 should be broadcast to other agents
     agent3.observe(x1)
 
-    x2 = agent2(x1）
+    x2 = agent2(x1)
     agent1.observe(x2)
     agent3.observe(x2)
     ```
diff --git a/src/agentscope/agents/__init__.py b/src/agentscope/agents/__init__.py
index b6578c990..14723727c 100644
--- a/src/agentscope/agents/__init__.py
+++ b/src/agentscope/agents/__init__.py
@@ -1,10 +1,11 @@
 # -*- coding: utf-8 -*-
 """ Import all agent related modules in the package. """
 from .agent import AgentBase
+from .operator import Operator
 from .rpc_agent import RpcAgentBase
 from .dialog_agent import DialogAgent
 from .dict_dialog_agent import DictDialogAgent
-from .operator import Operator
+from .user_agent import UserAgent
 
 
 __all__ = [
@@ -13,4 +14,5 @@
     "RpcAgentBase",
     "DialogAgent",
     "DictDialogAgent",
+    "UserAgent",
 ]