Cannot update to Lollipop version in moto G(2nd Generation) I didn't get any notification about the OS upgrade, Also I tried from my phone's Settings(Settings->About phone->System update). It resulted same there.

Kindly help me to upgrade to Lollipop version.
As instructed in the Moto G (2nd Generation) - Android™ 5.0  Lollipop - Release Notes :


  INSTRUCTIONS
  
  For a successful installation, we recommend installing this update
  when the battery in your phone is at least 50% charged and you are
  connected to a Wi-Fi network. 
  
  If you have received a notification
  message for this update:
  
  
  Select "Yes, I’m in".
  After the software is downloaded, select "Install now".
  After the software is installed, your phone will re-start automatically.
  Your phone is now updated with 22.21.25
  
  
  If you have not received a notification message for this update,
  follow the steps below to manually update your phone:
  
  
  Select the Settings icon in the apps menu.
  Select "About phone".
  Select "System updates".
  Select "Yes, I’m in". After the software is downloaded, select "Install now".  
  After the software is installed, your phone will re-start automatically.
  Your phone is now updated to 22.21.25
  
  
  Additional Information
  
  If you have difficulty with this upgrade, visit us at
  www.motorola.com/mymotog.