diff --git a/src/interface.jl b/src/interface.jl
index c9f0ff0..423dd65 100755
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -2,7 +2,7 @@ module interface
     
 
 export agent, addNewMessage, clearMessage, removeLatestMsg, generatePrompt_tokenPrefix,
-        generatePrompt_tokenSuffix
+        generatePrompt_tokenSuffix, conversation
 
 using JSON3, DataStructures, Dates, UUIDs
 using CommUtils
@@ -35,12 +35,14 @@ using CommUtils
 
 #
 @kwdef mutable struct agent
-    availableRole=["system", "user", "assistant"]
-    agentName::String="assistant"
-    maxUserMsg::Int= 10
-    earlierConversation::String=""  # summary of earlier conversation
-    thoughts::String= "" # internal thinking area
-    mqttClient::Union{mqttClient, Nothing}= nothing 
+    availableRole = ["system", "user", "assistant"]
+    agentName::String = "assistant"
+    maxUserMsg::Int = 10
+    earlierConversation::String = ""  # summary of earlier conversation
+    mqttClient::Union{mqttClient, Nothing} = nothing 
+    msgMeta::Union{Dict, Nothing} = nothing 
+
+    thought::String = "" # internal thinking area
 
     """ Dict(Role=> Content)  ;   Role can be system, user, assistant
       Example:
@@ -50,14 +52,27 @@ using CommUtils
               Dict(:role=>"user", :content=> "Hello, how are you"),
               ]
     """
-    # Ref: Chat prompt format https://huggingface.co/TheBloke/Llama-2-7B-Chat-GGML/discussions/3
-    messages= [Dict(:role=>"system", :content=> "You are a helpful assistant.", :timestamp=> Dates.now()),]
+
+    # # Ref: Chat prompt format https://huggingface.co/TheBloke/Llama-2-7B-Chat-GGML/discussions/3
+    # messages= [Dict(:role=>"system", :content=> "You are a helpful assistant.", :timestamp=> Dates.now()),]
 end
 
 function agent(
   agentName::String,
   systemMessage::String,  # system message of an agent
   mqttClientSpec::Tuple;
+  msgMeta::Dict=Dict(
+    :msgPurpose=> "updateStatus",
+    :from=> "chatbothub",       
+    :to=> "llmAI",
+    :requestrespond=> "request",
+    :sendto=> "",      # destination topic
+    :replyTo=> "chatbothub/llm/respond",     # requester ask responder to send reply to this topic
+    :repondToMsgId=> "",   # responder is responding to this msg id
+    :taskstatus=> "",       # "complete", "fail", "waiting" or other status
+    :timestamp=> Dates.now(),
+    :msgId=> "$(uuid4())",
+  ),
   availableRole::AbstractArray=["system", "user", "assistant"],
   maxUserMsg::Int=10,)
   
@@ -66,7 +81,7 @@ function agent(
   newAgent.maxUserMsg= maxUserMsg
   systemMessage= "Your name is $agentName. " * systemMessage
   newAgent.messages= [Dict(:role=>"system", :content=> systemMessage, :timestamp=> Dates.now()),]
-  newAgent.mqttClient= mqttClient(mqttClientSpec)
+  newAgent.mqttClient= CommUtils.mqttClient(mqttClientSpec)
 
   return newAgent
 end
@@ -186,14 +201,127 @@ function generatePrompt_tokenPrefix(a::agent;
   return prompt
 end
 
+#WORKING
+function conversation(a::agent, usermsg::String)
+  userIntent = identifyUserIntention(a, usermsg)
+  @show userIntent
+
+
+end
+
+#WORKING
+function identifyUserIntention(a::agent, usermsg::String)
+  identify_usermsg = 
+  """
+    You are to determine intention of the question.
+    Your choices are:
+    chat: normal conversation that you don't need to do something.
+    task: a request for you to do something.
+
+    Here are examples of how to determine intention of the question:
+    Question: How are you?
+    Answer: {chat}, this question intention is about chat.
+
+    Question: Ummm.
+    Answer: {chat}, this question is about chat.
+
+    Question: Search for the stock prices of 'BJC' and 'IOU'on June 10th.
+    Answer: {task}, this question is about asking you to do something.
+
+    Question: Hello
+    Answer: {chat}, this question is about chat.
+
+    Question: 'BJC' and 'IOU'on June 10th.
+    Answer: {task}, this question is about asking you to do something.
+
+    Question: What time is it?
+    Answer: {task}, this question is about asking you to do something.
+
+    Question: What is the price of 'ABC'
+    Answer: {task}, this question is about asking you to do something.
+
+    Question: Do you like coconut?
+    Answer: {task}, this question is about asking you to do something.
+
+    Question: What is the weather tomorrow?
+    Answer: {task}, this question is about asking you to do something.
+
+    Question: I'm fine.
+    Answer: {chat}, this question is about chat.
+
+    Question: How to make a cake?
+    Answer: {task}, this question is about asking you to do something.
+
+    Question: Did you turn off the light?
+    Answer: {task}, this question is about asking you to do something.
+
+    Question: What is stock price of Tesla on June 6th?
+    Answer: {task}, this question is about asking you to do something.
+
+    Question: Tell me some jokes.
+    Answer: {chat}, this question is about chat.
+
+    Begin!
+
+    Question: {input}
+  """
+
+  identify_usermsg = replace(identifymsgPrompt, "{input}" => usermsg)
+
+  msg = Dict(
+    :msgMeta=> a.msgMeta,
+    :txt=> identifymsgPrompt,
+  )
+
+  payloadChannel = Channel(1)
+
+  # send prompt
+  CommUtils.request(a.mqttClient, msg, pubtopic=a.mqttClient.pubtopic.llmAIgpu)
+  starttime = Dates.now()
+  timeout = 10
+  result = nothing
+
+  while true
+    timepass = (Dates.now() - starttime).value / 1000.0
+    CommUtils.mqttRun(mqttclient, payloadChannel)
+    if isready(payloadChannel)
+      topic, payload = take!(payloadChannel)
+      if payload[:msgMeta][:repondToMsgId] == msgPrompt[:msgMeta][:msgId]
+        result = payload[:txt]
+        break
+      end
+    elseif timepass <= timeout
+      # skip, within waiting period 
+    elseif timepass > timeout
+      result = nothing
+      break
+    else
+      error("undefined condition $(@__LINE__)")
+    end
+  end 
+
+  answer = getStringBetweenCharacters(result, "{", "}")
+
+  return answer
+end
 
 
 
+function getStringBetweenCurlyBraces(s::AbstractString)
+  m = match(r"\{(.+?)\}", s)
+  m = m == "" ? "" : m.captures[1]
+  return m
+end
 
-
-
-
-
+function getStringBetweenCharacters(text::AbstractString, startChar::String, endChar::String)
+  startIndex= findlast(startChar, text)
+  endIndex= findlast(endChar, text)
+  if startIndex === nothing || endIndex === nothing
+    return nothing
+  else
+    return text[startIndex.stop+1: endIndex.start-1]
+  end
+end