Personal admin
Tell people about a change in contact details
A contact update is simple once you decide who needs the new details and how much each group should know. If your audiences differ, ask for a separate draft for each.
What to check in the answer
Read each draft to confirm the new email and phone number are correct, and that your personal phone number appears only in the friends-and-family version. Some people may need only the email or only the number, so trim each version to what that group needs. The assistant has not sent anything, so you decide who receives each version.
What to do next
Before sending, go through your contacts and decide which version each person gets. Update any account that uses your old email or number for login or recovery. If you need a version for another setting, such as a community group or a professional directory, ask for it and describe the tone you want.