Strange conversation

actual conversation had today:

Person 1: "Tickets to the film?"

Person 2: "Tickets to the film."

Person 1: "Just one?"

Person 2: "Just one."

Person 1: "There you go. It starts at 2."

Person 2: "It starts at 2."

(Person 2 smiles and walks away. Person 1 wonders if Person 2 was mocking her...)