What is the difference between these two?
Customer service representative: Hello, my name is Cassie, an agent OF XXX company, telling you about our latest offer...
And
Customer service representative: Hello, my name is Cassie, an agent FROM XXX company, telling you about our latest offer...
Let's say you are "cold calling" potential clients. Do the sentences above both possible? -as it may have different meanings. Or it should have only one grammatical preposition?