I made my reservations last week

[kadioguy]

(From a TOEIC test)

Woman: Have you made arrangements to attend the sales conference in London?

Man: Sort of. I've registered to attend the conference, but I haven't booked a room yet.

Woman: You should really do that soon. I made my reservations last week and the conference hotels are already full. I’m staying severat miles from the convention center.

[...]
[https://i.imgur.com/h7vnzSU.jpg]
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1. Why is “arrangements” in the plural? I think that that refers to things about attending the sales conference, for example, to register to attend the conference and to book a room.

2. Why is “reservations” in the plural? I think that that also refers to things about attending the sales conference, for example, to have a seat on a plane or train, a room in a hotel, and a taxi to the convention center, kept for you.

Are my thoughts reasonable?

Or maybe I’m overthinking about that – “a reservation” and “reservations” can practically mean the same. Please see below:

We made dinner reservations at the restaurant for 6 o'clock.
https://learnersdictionary.com/definition/reservation

We have a reservation in the name of Grant.
https://www.oxfordlearnersdictionaries.com/definition/english/reservation?q=reservation


What do you think?

 

[Tdol]

You have to arrange travel, hotel, entrance, etc. She could have booked more than one person in.

 

[jutfrank]

Are my thoughts reasonable?

I think so, yes.

 

[tedmc]

I think it is usual to use the plural to be on the save side, to be all-inclusive, even though there may only be a single item.

 

[Tdol]

typo- safe not save