diff --git a/src/type.jl b/src/type.jl
index d4ac39e..3beb072 100644
--- a/src/type.jl
+++ b/src/type.jl
@@ -85,10 +85,17 @@ abstract type agent end
   thinkinglimit::Integer # thinking round limit
   thinkingcount::Integer      # used to count attempted round of a task
 
-  # memory
-  # Ref: Chat prompt format https://huggingface.co/TheBloke/Llama-2-7B-Chat-GGML/discussions/3
-  # messages= [Dict(:role=>"system", :content=> "", :timestamp=> Dates.now()),]
-  chathistory::Vector{Dict{Symbol, Any}} = Vector{Dict{Symbol, Any}}() # store messages history in the format :name=>"message"
+  """ Memory
+    Ref: Chat prompt format https://huggingface.co/TheBloke/Llama-2-7B-Chat-GGML/discussions/3
+    NO "system" message in chathistory because I want to add it at the inference time
+    chathistory= [
+      Dict(:name=>"user", :text=> "Wassup!", :timestamp=> Dates.now()),
+      Dict(:name=>"assistant", :text=> "Hi I'm your assistant.", :timestamp=> Dates.now()),
+    ]
+
+  """
+  chathistory::Vector{Dict{Symbol, Any}} = Vector{Dict{Symbol, Any}}() 
+
   maxHistoryMsg::Integer  # 31th and earlier messages will get summarized
   keywordinfo::Dict{Symbol, Any} = Dict{Symbol, Any}(
     :userinfo => Dict{Symbol, Any}(),