askSize:
    component: "System.CommonResponse"
    properties:
      processUserMessage: true
      keepTurn: false
      variable: "pizzaSize"
      nlpResultVariable: "iResult"       
      metadata: 
        responseItems:         
        - type: "text"  
          text: "What size of pizza do you want?" 
          actions: 
          - label: "(${enumValue[0]?upper_case})${enumValue?keep_after(enumValue[0])}"
            type: "postback"
            keyword: "${enumValue[0]?upper_case},${(enumValue?index)+1}"
            payload: 
              variables: 
                pizzaSize: "${enumValue}" 
            iteratorVariable:  "pizzaSize.type.enumValues" 
    transitions: 
      next: "confirmOrder"