Everyday English in conversation about memory

I can't think of it off hand!

Bernard is trying to get a hold of Herbert, but he forgets his phone number, so he asks Beatrice....

Bernard:

Do you know what Herbert's phone number is?

Beatrice:

Oh, Herbert's phone number? I don't have my address book on me....hmmm...I can't think of it right off hand.

Bernard:

That's too BAD! I've got to find him. It's urgent! If I can't find him today, I'll be dead!

Beatrice:

Well, why don't you call Michelle? She has his phone number.

Bernard:

I've tried, but no one ANSWERED!

Beatrice:

Oh, you are so dead!

Hear the whole conversation.

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