"Why were you at X when you told me you were at Y? And why did you order for 2 people? Why have you been going there for the last Z months?" "By following the

"Why were you at X when you told me you were at Y? And why did you order for 2 people? Why have you been going there for the last Z months?" "By following the pattern of when you were there and what you ordered, I found the other person's details too"