diff --git a/src/interface.jl b/src/interface.jl
index 09eb9ce..d8b91aa 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -237,7 +237,7 @@ function decisionMaker(a::T; recent::Integer=5)::Dict{Symbol,Any} where {T<:agen
     chathistory = chatHistoryToText(a.chathistory)
 
     # check if winename in shortmem occurred in chathistory. if not, skip decision and imediately use PRESENTBOX
-    if haskey(a.memory[:shortmem], :available_wine)
+    if length(a.memory[:shortmem][:available_wine]) != 0
       # check if wine name mentioned in recentevents, only check first wine name is enough
       # because agent will recommend every wines it found each time.
       winenames = []
@@ -263,7 +263,7 @@ function decisionMaker(a::T; recent::Integer=5)::Dict{Symbol,Any} where {T<:agen
     end
 
     context = # may b add wine name instead of the hold wine data is better
-    if haskey(a.memory[:shortmem], :available_wine)
+    if length(a.memory[:shortmem][:available_wine]) != 0
       winenames = []
       for (i, wine) in enumerate(a.memory[:shortmem][:available_wine])
         name = "$i) $(wine["wine_name"]) "
@@ -872,11 +872,11 @@ function think(a::T)::NamedTuple{(:actionname, :result),Tuple{String,String}} wh
 
   elseif actionname == "CHECKINVENTORY"
     if rawresponse !== nothing
-      if haskey(a.memory[:shortmem], :available_wine)
-        vd = GeneralUtils.dfToVectorDict(rawresponse)
-        a.memory[:shortmem][:available_wine] = vcat(vd, rawresponse)
+      vd = GeneralUtils.dfToVectorDict(rawresponse)
+      if length(a.memory[:shortmem][:available_wine]) == 0
+        a.memory[:shortmem][:available_wine] = vcat(a.memory[:shortmem][:available_wine], vd)
       else
-        a.memory[:shortmem][:available_wine] = GeneralUtils.dfToVectorDict(rawresponse)
+        a.memory[:shortmem][:available_wine] = vd
       end
     else
       println("checkinventory return nothing")
@@ -965,7 +965,7 @@ function generatechat(a::sommelier, thoughtDict)
 
   # a.memory[:shortmem][:available_wine] is a vector of dictionary
   context =
-    if haskey(a.memory[:shortmem], :available_wine)
+    if length(a.memory[:shortmem][:available_wine]) != 0
       "Wines previously found in your inventory: $(availableWineToText(a.memory[:shortmem][:available_wine]))"
     else
       "N/A"
diff --git a/src/type.jl b/src/type.jl
index 31a26c3..6273224 100644
--- a/src/type.jl
+++ b/src/type.jl
@@ -180,10 +180,11 @@ function sommelier(
 
   memory = Dict{Symbol, Any}(
             :chatbox=> "",
-            :shortmem=> OrderedDict{Symbol, Any}(),
+            :shortmem=> OrderedDict{Symbol, Any}(
+              :available_wine=> [],
+            ),
             :events=> Vector{Dict{Symbol, Any}}(),
             :state=> Dict{Symbol, Any}(
-              :wine_presented_to_user=> "None",
             ),
             :recap=> OrderedDict{Symbol, Any}(),
           )