you do not have to book the ticker 同义句

you needn't book the ticket. 应该是ticket吧，订票

There is no need to book the ticket.
或者Making a reservation is not necessary.

You do not have to book the ticket.

=You need not book the ticket.

=You don't need to book the ticket.

have to → 不得不.而这里可以灵活的翻译成:
you do not have to book the ticket. → 你不用订票.

所以:
you don't need to book the ticket.

need的用法.
作情态动词:直接用needn't + do/n.
作实意动词:don't need + to do .
而这里不推荐needn't + do的形式.说错也没错.但是习惯用法只有在后面为名词的时候才会使用needn't.

二楼的第一句there is no need to do → 做某事是没必要的.也对.
但是第二句也不建议.在考试中最好不要把句子做很大的变动.