Isamaya has come home for the christmas holidays and has left her keys in London.

Isamaya: Dad, can i borrow the spare key again please cos i've forgotten mine.
Mike: And which spare key would that be?
Isamaya: You know, the key you gave me last time i came home and the time before that?
Mike: I think your assuming things Isamaya.
Isamaya: Dad, you've got 3 spare keys for the front door?
Mike: I don't know of any 'spare key'. I only know of my personal keys.
Isamaya: Well... could i please use one of your 'personal keys'