You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Q: Person1: I need some flowers for my wife . It's her birthday .
Person2:Very well . We have some fresh red roses .
Person1: How much are the roses ?
Person2:$ 20 per dozen .
Person1: That sounds like a good deal .
Person2:Yes , they're on sale today .
Person1: I'll take a dozen .
Person2:Splendid . Will there be anything else ?
Person1: No , the roses will be fine .
Person2:I'm sure your wife will love them .
A:
informal