'Do you have any questions?'
'Well... I mean... so you just want me to guard this red button?'
'That is classified information, I'm afraid - even the Prime Minister doesn't know what it does. Ha!'
'Oh. So who does know?'
'It just seems a bit bizarre.'
'Ha! Yes, yes.'
'Erm... is there anywhere to sit?'
'Can I read?'
'Not on the job.'
'And who should I be guarding this against?'
'So who is allowed to push the button?'
'Nobody at all. Not even the Prime Minister is allowed to push it. Ha!'
'So I should be stopping everybody coming in apart from the other guards? Even you?'
'Oh, there aren't any other guards. Just lock up at the end of your shift.'
'Is this a wind up?'
'Great. See you later.'