Language: On the phone

Here's a tip:

Let's imagine your name is Joe. If you're on the phone, how do you introduce yourself?

Well, if you're talking to a person who knows you or your company, say, "this is Joe (from -company-)".

If you're talking to a stranger, try "my name is Joe" and explain where you're from or why you're calling.

For example:
(someone you know well)
Bob: Hello, Bob speaking.
Joe: Hi, Bob. This is Joe.
Bob: Oh, hi Joe! How are you?

(someone you know a little)
Bob: Hello, ABC Company, Bob speaking.
Joe: Oh, hello. This is Joe from English Building; how are you?
Bob: Oh, hello Bob. I'm good, thanks...

(someone you don't know at all)
Bob: Hello, ABC Company, Bob speaking.
Joe: Oh, hello. My name is Joe Bloggs, and I'm calling from English Building. I'd like to talk to someone about an account...

You can use this in email too. If you're talking to someone who knows you, never say "I am Joe". It sounds strange.