Is there any difference between saying :<br/><br/>'Its <b>my pleasure</b> to do something for her/to meet you/'.<br/><br/>'Its <b>a pleasure</b> to do something for him/to meet you'.<br/><br/>Its <b>a pleasure/my pleasure</b> she gives me the opportunity to do something for her'.<br/><br/>Does the bold one has a different meaning ?<br/><br/>Please suggest,