French phrase
Je suis à votre disposition pour ~.
Meaning
I am at your disposal to ___.
When to use it
A formal offer to provide help with a specific matter. It is especially common in professional communication.
Example dialogue
Bonjour, j'ai une question sur le contrat.
Hello, I have a question about the contract.
Je suis à votre disposition pour répondre à vos questions.
I am at your disposal to answer your questions.