diff --git a/src/interface.jl b/src/interface.jl
index 0c5fa29..5349f7d 100755
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -199,10 +199,43 @@ function planner_mistral_openorca(a::agentReflex)
     $(a.roleSpecificInstruction[a.role])
   """
   
+  # assistant_plan_prompt =
+  #   """
+  #   <s>
+  #     <|system|>
+  #     <About yourself>
+  #     $aboutYourself
+  #     </About yourself>
+  #     <You have access to the following tools>
+  #     $toollines
+  #     </You have access to the following tools
+  #     <Your earlier work>
+  #     $shorttermMemory
+  #     </Your earlier work>
+  #     <Your job>
+  #     Plan: first you should always think about your conversation with the user and your earlier work thoroughly then extract and devise a complete, task by task, plan to achieve your objective (pay attention to correct numeral calculation and commonsense).
+  #     Keyword memory: using JSON format, list all variables in the plan you need to find out
+  #     P.S.1 each task of the plan should be a single action.
+  #     </Your job>
+  #     <Example>
+  #     Plan: 
+  #     1. Ask the user about how many miles per day they drive
+  #     2. Ask the user about what stuff they usually carry with
+  #     3. Ask the user about preferred type of car they want to buy (sedan, sport, SUV, etc)
+  #     4. Ask the user about their price range
+  #     5. Use inventory tool to find cars that match the user's preferences and are within their price range
+  #     6. Use finalanswer tool to present the recommended car to the user.
+  #     Keyword memory: {"mile per day": null, "carry item": null, "car type": null, "price range": null}
+  #     </Example>
+  #   </s>
+  #   $conversation
+  #   <|assistant|>
+  #   Plan: 
+  #   """
+
   assistant_plan_prompt =
     """
-    <s>
-      <|system|>
+    <|im_start|>system
       <About yourself>
       $aboutYourself
       </About yourself>
@@ -227,12 +260,13 @@ function planner_mistral_openorca(a::agentReflex)
       6. Use finalanswer tool to present the recommended car to the user.
       Keyword memory: {"mile per day": null, "carry item": null, "car type": null, "price range": null}
       </Example>
-    </s>
+    <|im_end|>
     $conversation
-    <|assistant|>
+    <|im_start|>assistant
     Plan: 
     """
 
+
   response = sendReceivePrompt(a, assistant_plan_prompt, max_tokens=1024, temperature=0.1,
                           timeout=180, stopword=["<|user|>", "</"])
   response = split(response, "<|")[1]
diff --git a/src/utils.jl b/src/utils.jl
index 30e359f..c33b21d 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -471,7 +471,7 @@ end
   julia> messagesToString(agent.messages)
   "<|im_start|>user: Hi there.\n<|im_end|><|im_start|>assistant:   Hello! How can I assist you today?\n<|im_end|>"
   ```
-""" 
+"""
 function messagesToString(messages::AbstractVector{T}; addressAIas="assistant") where {T<:AbstractDict}
   conversation = ""
   if length(messages)!= 0
@@ -489,9 +489,9 @@ function messagesToString(messages::AbstractVector{T}; addressAIas="assistant")
       end
 
       if role == "user"
-        conversation *= "<|$role|>\n $(content[1:end-nouse])\n</|$role|>"
+        conversation *= "<|im_start|>$role\n $(content[1:end-nouse])\n<|im_end|>"
       elseif role == "assistant"
-        conversation *= "<|$addressAIas|>\n $(content[1:end-nouse])\n</|$addressAIas|>"
+        conversation *= "<|im_start|>$addressAIas\n $(content[1:end-nouse])\n<|im_end|>"
       else
         error("undefied condition role = $role $(@__LINE__)")
       end
@@ -502,6 +502,7 @@ function messagesToString(messages::AbstractVector{T}; addressAIas="assistant")
 
   return conversation
 end
+
 # function messagesToString(messages::AbstractVector{T}; addressAIas="assistant") where {T<:AbstractDict}
 #   conversation = ""
 #   if length(messages)!= 0
@@ -519,9 +520,9 @@ end
 #       end
 
 #       if role == "user"
-#         conversation *= "<|$role|>\n $(content[1:end-nouse])\n</s>"
+#         conversation *= "<|$role|>\n $(content[1:end-nouse])\n</|$role|>"
 #       elseif role == "assistant"
-#         conversation *= "<|$addressAIas|>\n $(content[1:end-nouse])\n</s>"
+#         conversation *= "<|$addressAIas|>\n $(content[1:end-nouse])\n</|$addressAIas|>"
 #       else
 #         error("undefied condition role = $role $(@__LINE__)")
 #       end
@@ -534,6 +535,7 @@ end
 # end
 
 
+
 """ Convert a vector of dict into 1-continous string.
 
   Arguments: