diff --git a/src/interface.jl b/src/interface.jl
index 82626d5..1cfdb8e 100644
--- a/src/interface.jl
+++ b/src/interface.jl
@@ -787,13 +787,6 @@ function reflector(config::T1, state::T2)::String where {T1<:AbstractDict, T2<:A
 end
 
 
-function transition()
-  error("--> transition")
-end
-
-
-
-
 """ Get a new state
 
 # Arguments
@@ -833,7 +826,7 @@ julia>  thoughtDict = Dict(
 
 # Signature
 """
-function transition(config::T1, state::T2, decisionMaker::Function, evaluator::Function, 
+function transition(state::T2, config::T1, decisionMaker::Function, evaluator::Function, 
   reflector::Function
   )::Tuple{String, Dict{Symbol, <:Any}, Integer} where {T1<:AbstractDict, T2<:AbstractDict}
 
@@ -982,8 +975,8 @@ function conversation(a::T, userinput::Dict) where {T<:agent}
   end
 
   while true
-    bestNextState, besttrajectory = LLMMCTS.runMCTS(config, a.plan[:currenttrajectory], 
-                              decisionMaker, evaluator, reflector, transition;
+    bestNextState, besttrajectory = LLMMCTS.runMCTS(a.plan[:currenttrajectory], 
+                              transition, config, decisionMaker, evaluator, reflector;
                               totalsample=2, maxDepth=3, maxiterations=3, explorationweight=1.0)
     a.plan[:activeplan] = bestNextState