implement back pointer

chatState.go

@@ -53,6 +53,9 @@ func getCurrentState(openID string, procedure string) (result chatState, err err
 }
 
 func setCurrentState(openID, procedure string, state chatState) (newState chatState, err error) {
+	state.OpenID = openID
+	state.Procedure = procedure
+
 	j, err := json.Marshal(state)
 	if err != nil {
 		return