Fetching Multiple values from index's on Common Response Component

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Hi All,

I am not able to capture the multiple index values in a single variable.I have attached the screenshot of issue.Please help me to troubleshoot  this issue.

Please refer the below yaml code.

 

askSize:
    component: "System.CommonResponse"
    properties:
      processUserMessage: true
      keepTurn: false
      variable: "a1"
      nlpResultVariable: "iResult" 
      useFullEntityMatches: true
      metadata: 
        responseItems:         
        - type: "text"  
          text: "${(res_attendeName?index)+1}.${res_attendeName.name}" 
          footerText: "Enter a number or tap your selection."
          separateBubbles: false
          iteratorVariable:  "res_attendeName" 
    transitions: 
      next: show_attend    
           
  show_attend:
   component: "System.Output"
   properties:
     text: " Ok , Your selected attendees is ${a1}"
   transitions: 
     return : "done"

 

Thank you

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