Typical British Introduction:
A: This food is delicious, isn't it?
B: Yes. Sam is a great cook!
half an hour later...
A: Well, good chatting with you. I hope to see you again. Oh, my name's Ben, by the way.
Typical American Introduction:
A: Hi, I'm Tim.
B: Nice to meet you, Tim. Do you work with Emma?
Maybe if you talk to John about this cultural difference, he'll agree to introduce you-the American way. But when you're in the UK, you should agree to do things the British way. Good luck! - Annie