diff --git a/src/interface.jl b/src/interface.jl
index d25ebb5..4237026 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -87,15 +87,14 @@ using ..type, ..util, ..llmfunction
 """ #TODO update document
 function conversation(a::T) where {T<:agent}
   while true
-    println("---> conversation loop")
-    println("---> a.receiveUserMsgChannel ready = $(isready(a.receiveUserMsgChannel))")
     # check for incoming user message
     if isready(a.receiveUserMsgChannel)
       incomingMsg = take!(a.receiveUserMsgChannel)
       incomingPayload = incomingMsg[:payload]
+
+      # "newtopic" command to delete chat history
       if incomingPayload[:text] == "newtopic"
         clearhistory(a)
-        @show incomingMsg
         msgMeta = deepcopy(a.msgMeta)
         msgMeta[:sendTopic] = incomingMsg[:msgMeta][:replyTopic]
         msgMeta[:senderName] = "agent-backend"
@@ -116,22 +115,16 @@ function conversation(a::T) where {T<:agent}
         client, connection = MakeConnection(a.config[:mqttinfo][:broker], 
                               a.config[:mqttinfo][:port])
         connect(client, connection)
-
-        @show outgoingMsg
         publish(client, outgoingMsg[:msgMeta][:sendTopic], 
                 JSON3.write(outgoingMsg))
         disconnect(client)
-        println("published")
-      else
+
+      else  # a new thinking
 
       end
     end
 
 
-    #   # if new message == "newtopic"
-    #     #TODO add "newtopic" command to delete history
-
-
     
 
     #   # else
@@ -149,7 +142,7 @@ function conversation(a::T) where {T<:agent}
     #       # actor loop(best plan)
 
     #     # end  
-    sleep(3)
+    sleep(1)
   end