In many cases, another person will need access to book travel on behalf of someone else; in Travel, this person is referred to as a Travel Planner.
Step 1: From the homepage, select Profile, and select then Travel Planner.
Step 2: Add User by clicking '+Add'.
Step 3: Enter the Member ID of your travel planner(s). Click Save to add to your profile.
Now you can toggle between users in the top right-hand corner and book Travel on their behalf: