Not able to send response back from instant app

Summary

Not able to send response back from instant app

Content

I have  created a bot with following code

 

metadata:

  platformVersion: "1.0"

main: true

name: "AshishBots"

context:

  variables:

    welcomeMessage: "showWelcomeMessage"

    messageResponse: "string"

    iResult: "nlpresult"

states:

  intent:

    component: "System.Intent"

    properties:

      variable: "iResult"

      confidenceThreshold: 0.4

    transitions:

      actions:

        Welcome Message: "showWelcomeMessage"

        Visa Tracking: "checkVisaStatus"

        unresolvedIntent: "unresolved"

  showWelcomeMessage:

    component: "System.List"

    properties:

      options: "${welcomeMessage.type.enumValues}"

      prompt: "Please select from following option"

      variable: "welcomeMessage"

    transitions: {}

  checkVisaStatus:

    component: "System.Interactive"

    properties:

      sourceVariableList: "welcomeMessage"

      variable: "messageResponse"

      id: "Visa_Tracking_App_1"

      prompt: "Please click on the link to track your visa"

    transitions: {}

  instantAppOutput:

    component: "System.Output"

    properties:

      text: "Your passport number is '${messageResponse.value.passportno}'"