What stawka said.

Professional = business like.. it is a business to customer transaction.

None of this buyer is a lier (sic) stuff!

- but suspect that what ever it is it wouldn't even come close to describing how seller really feels!

Close to the mark there, when a customer service operator has the customer from hell on the line.. are they going to react in a 'professional' way or lose their cool (and their job probably) and say what they really feel instead?