title: Regex to match a string after colon ":"
body: <p>I need to identify a sub string from any string based on a regular expression.</p>
  
  <p>For Example, take the following strings:</p>
  
  <ol>
  <li>It sent a notice of delivery of goods: UserName1</li>
  <li>Sent a notice of delivery of the goods: User is not found, UserName2</li>
  <li>It sent a notice of receipt of the goods: UserName1</li>
  <li>It sent a notice of receipt of the goods: User is not found, UserName2</li>
  </ol>
  
  <p>I want to get the text after colon</p>
  
  <ol>
  <li>UserName1</li>
  <li>User is not found, UserName2</li>
  <li>UserName1</li>
  <li>User is not found, UserName2</li>
  </ol>