French phrase
Je voudrais annuler ~ .
Meaning
I would like to cancel ___.
When to use it
A polite request to cancel an enrollment or registration.
Example dialogue
Bonjour, je suis du secrétariat, en quoi puis-je vous aider ?
Hello, I'm from the administrative office. How may I help you?
Je voudrais annuler mon inscription au semestre prochain.
I would like to cancel my enrollment for next semester.