function getInputData() {
    try {
      // Get the last run time from the script parameter
      let lastRunTime = runtime.getCurrentScript().getParameter({
        name: 'custscript_last_run_time'
      });

      // If null, set to yesterday at midnight
      if (!lastRunTime) {
        lastRunTime = new Date();
        lastRunTime.setHours(0, 0, 0, 0);
        lastRunTime.setDate(lastRunTime.getDate() - 1);
      } else {
        lastRunTime = new Date(lastRunTime);
      }

      // Load the script deployment record to set the last run time
      var scriptDeployment = record.load({
        type: record.Type.SCRIPT_DEPLOYMENT,
        id: runtime.getCurrentScript().deploymentId
      });

      scriptDeployment.setValue({
        fieldId: 'custscript_last_run_time',
        value: new Date()
      });

      // Save the script deployment record
      scriptDeployment.save();

      // Search messages created after the last run time, the only column we need is internalid
      return search.create({
        type: 'message',
        filters: [
          ['created', 'after', lastRunTime]
        ],
        columns: ['internalid']
      });

    } catch (e) {
      log.error({
        title: 'Error in getInputData',
        details: e.toString()
      });
      throw e;
    }
  }

runtime.getCurrentScript().deploymentId