1
general::
Phrase(s): make arrangements for someone
to plan accommodations for someone. • John is coming for a visit next week. Please make arrangements for him at the hotel. • I will make arrangements for everyone when I call the hotel.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Plan or prepare for someone or something, as in Who is making all the arrangements for our sales meeting? This expression employs arrangements in the sense of "measures or preparations for a particular purpose," a usage dating from the late 1700s.
American Heritage Idioms