diff --git a/src/interface.jl b/src/interface.jl
index e69da79..8c1ca5c 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -778,9 +778,12 @@ function generatechat!(a::T; maxattempt::Integer=10
 
     # you should then respond to the user with interleaving plan, action_name, action_input  in JSON format
       1) "plan", Based on the current situation, state a complete action plan to complete the task and rationale. Be specific.
-      2) "action_name", Must be "CHAT_BOX
+      2) "action_name", action_name must be CHAT_BOX.
       3) "action_input", Dialogue you want to chat with the user according to your plan.
       After the action is executed you gets "action_result". It is the output from the action you selected.
+     
+    # available actions
+      "CHAT_BOX", which you can use to talk with the user. The input is dialogue you want to chat with the user according to your plan.
     """
 
   system_msg = Dict(
@@ -817,7 +820,7 @@ function generatechat!(a::T; maxattempt::Integer=10
               ),
             "action_name"=> Dict(
               "type"=> "string",
-              "description" => "Must be CHAT_BOX",
+              "description" => "action_name must be CHAT_BOX",
               ),
             "action_input"=> Dict(
               "type"=> "string",