Definition: 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'.
Input: Person1: So you said you and Amanda met through a mutual friend . How did it happen ?
Person2:Well , my roommate was friends with Amanda , so he introduced us .
Person1: Did he tell you what she was like first ?
Person2:Yes , he described her to me , and she sounded like my type .
Output:
informal