French phrase
Veuillez me prévenir si ~ changent.
Meaning
Please let me know if ___ change.
When to use it
A polite request to be told about changes. It suits plans or schedules and has a respectful tone.
Example dialogue
Veuillez me prévenir si les plans changent.
Please let me know if the plans change.
Très bien, je vous tiendrai au courant.
Very well, I will keep you informed.