@ibkfin Guests cannot be added to your profile. I take it by guest you mean a non-employee of your company, correct?
The only ways to book for someone else is:
1. If your company has turned on the Guest Booking option for you.
2. You call your travel agency and have them do the booking.
I would suggest option 2 as it will likely be easier to get in touch with the travel agency rather than track down who your site administrator is.