YOU SAID:

Hi there, can I book a taxi for twelve people, please?

INTO JAPANESE

こんにちは、12人のタクシーを予約できますか？

BACK INTO ENGLISH

Hello, Can I make a reservation the 12 people of the taxi?

INTO JAPANESE

こんにちは、タクシーの12人を予約できますか？

BACK INTO ENGLISH

Hello, Can I make a reservation the 12 people of the taxi?