Please follow instruction below for delegate access (granting permission for person) -:
1.Open Microsoft Outlook go to "File> Account Settings> Delegate Access"
2.Click on "add"
3.Choose the name of person that you want to add permission and click "add"
4.You can determine and select delegate access permission level for that person and click "OK"
5.Re-open outlook again to make sure that permission has been add and you can organize your delivery meeting below.