预订用的是我的名字。
The 'de' nominalizer
The particle 的 (de) here turns the verb phrase 预订用 (yùdìng yòng, used for booking) into a noun phrase. 预订用的 (yùdìng yòng de) means 'the one used for the booking'.
Sentence breakdown
This uses a 'Topic + 是 (shì) + Noun Phrase' structure to clarify a specific detail.
- 预订用的 (yùdìng yòng de): the (name) used for the booking
- 是 (shì): is
- 我的名字 (wǒ de míngzi): my name
Neutral tone
In the word 名字 (míngzi, name), the second syllable 'zi' is pronounced with a neutral tone, meaning it is short and light.
Notes
Use this when the booking might be under a different name or to clarify who made the reservation.