French phrase
Je suis ~ chez ~.
Meaning
I am ___ at ___'s.
When to use it
Describes being at a person's place or a company's premises. The tone is polite and mildly formal.
Example dialogue
Où êtes-vous ?
Where are you?
Je suis en déplacement chez notre fournisseur.
I'm on a business trip at our supplier's.