French phrase
Merci de confirmer si vous assisterez à ~.
Meaning
Please confirm whether you will attend ___.
When to use it
A formal request to confirm event attendance. Used in advance for planning and formal correspondence.
Example dialogue
Merci de confirmer si vous assisterez à la conférence annuelle.
Please confirm whether you will attend the annual conference.
Malheureusement, je ne pourrai pas y assister.
Unfortunately, I will not be able to attend.