Open the direct chat with the user you want to delete.
Click on [Delete from your contact] from the [Gear] button on the right side of the chat screen.
A confirmation pop-up screen will be displayed,
Click and select [ Delete ], and the user can be deleted from your contacts.
・When a contact is deleted, your direct chat history with the other user is deleted as well, so use caution.
・For the business plan, contacts among users in the organization cannot be deleted.