What are the 2 non-permission based ways to be assigned to a user to assist them with their travel arrangements?

Without the self assigning assistant permission:

1. The user goes to their profile > assistants and travel arrangers > click add an assistant > in the assistant box, type the assistants name > select the assistant > check the can book travel for me box > click save.

2. Admin > company admin > user admin > search for the user > click on the pencil and paper icon on the right side under the profile column > assistants and travel arrangers > click add an assistant > in the assistant box, type the assistants name > select the assistant > check the can book travel for me box > click save.