Mourinho jokingly said he wanted Crerand to arrange a free annual subscription for the club's TV channel MUTV.
In response, Crerand said the only people who did not pay the £6 monthly fee were club employees.
To this, Mourinho replied: "There is no chance. I have to pay.
Crerand responded: "You never know. One day?
"One day? Nah. I don't think so," Mourinho said.
"You never know? Life is strange," Crerand persisted.
"You never know, but I don't think so," Mourinho said, before changing the subject.