'What does your company do?'

'Customer service.'
'Ok, but what is your product?'
'Customer service.'
'But ... what are you selling, how do you make money?'
'We excel at customer service. People love us.'
'But customer service for what, exactly?'
'Nothing. We just have excellent customer service.'
'...'
'☺'
'But ... umm ...'
'Thank you. Come again.'