[starbugstk]

He is learning fast from me

What is important is the code of conduct, the party's values, and who the party boss is.  All these must be whiter than white, and we will have the right party to lead.

I don't know who's the caller but think it's the buyer from a restaurant or restaurant chain or an hotel.
It should be : 'I don't know who the caller is/was not who's the caller'

KNNBCCB your English so fucked up and you want to correct others KNNBCCB!
If you are not sure ask SIMTAN