What does "I'm Carlos Hernández, a friend of his from Mexico City." mean in English for Spanish?

In English for Spanish, "I'm Carlos Hernández, a friend of his from Mexico City." means:

Soy Carlos Hernández, un amigo suyo de Ciudad de México.

Listen to "I'm Carlos Hernández, a friend of his from Mexico City.": (If you have an HTML5 enabled browser, you can listen to the native audio below)