Why did the woman buy two tickets?

M: [1]I’m sorry, miss, but dogs aren’t allowed in this theater.
W: [1]But I have a ticket for him.
M: I’m very sorry. but animals aren’t permitted.
W: You don’t understand. This is a special case. My dog is so well trained and so intelligent that he’s almost human.
M: I see that you have an exceptional animal. but...
W: I promise you that if there is any problem we’ll leave the theater immediately. I assure you that this dog isn’t like any other dog you’ve ever seen.
M: Well, all right. I’ll let you go in, since the theater is almost empty tonight. Nevertheless, your dog will have to behave himself, or you will have to leave.
W: Manager. what do you think of my dog now? [2]Several hours go by, and now people are leaving the theater.
M: I congratulate you. You were right; your dog behaved very well. I’ve been watching him, and it’s amazing how quiet he was.
W: I told you that he’s well trained and very intelligent.
M: He certainly is. It even seemed as if he was enjoying the movie.
W: [3]Oh, he did enjoy it. He liked the film very much. However, he liked the book much better.