21時に予約したのですがって英語でなんて言うの？

You can refer to your booking either by the time you reserved it for, or
by your surname, or
ideally, by both time and surname: "I have a reserved table for 9 o'cock
in the name of Smith."

Yes I have a reservation at 9:00
MEANING= straightforward way of saying yes I have reserved a table

I have a reservation under the name __ at 9:00
MEANING= the name---- you can say the name you booked it under for example : smith.

Yes I made a reservation the other day under the name _ at 9 for __ persons
MEANING= this is the full sentence you can use. You tell them your name, time you booked and for how many people.

The last one is really helpful for restaurants as it gives them all the information they need.

Hope this helps! ^ ^

If it was in the morning that you made this reservation for, You would say: I made a reservation for 9.00AM. However, if it was in the evening, you would say: I made a reservation for 21.00 PM.

In the third sentence, you have used the verb 'book' in its past tense form 'booked' which has several meanings, but, in this context, it means 'reserve (accommodation, a place, etc.); buy (a ticket) in advance.

Reserved - reservation is a noun meaning the action of reserving something.

Let's look at a short dialogue:

Excuse me, do you have a reservation?

Yes I reserved a table under the name Ann for 9.00

You can use the above sentence to confirm the reservation.
Remember we say "reservation for".

A) I made reservation for 21h00
Made-(past and past participle of make. )form (something) by putting parts together or combining substances; create.
Example -"my grandmother made a dress for me"
Reservation -.the action of reserving something.

B)B) I have a reservation for 21h00
*Have-possess, own, or hold.

I hope this helps !

Yes,I have a 9:00 reservation.
This is what you can say to confirm that a reservation was made and wait to be prompted for more information.

The reservation was made under Mr.X for 9:00.
This is a useful way to confirm and provide the necessary information before you are asked for it.

You can also just say "I have a reservation under Franklin"

The first two answers are are very streight forward and directly answer waiter's question.
"There should be a reservation for 9:00 under name "XYZ" adds additional information such as the name of the person who booked the table, which makes the process of being eated at a table faster.

Yes, I have made previous booking for 9pm under the name.....
Using this answer will give the person listening all the information that is required and stop them from asking further questions and giving you the things that you are looking for.

Use the sentences above to state your reservation and time.
You can also mention the name of the person who the reservation is made under, for example, "I have a 9 am reservation under the name Nkateko Shibambu."
"I have a booking for 9 am under the name Sussy Belly."