Detailed Instructions: 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: Can you believe that Susan got married ?
Person2:Really ? I remember she said if she would remain single . Is the man very rich ?
Person1: No . That ' s what is surprising me .
Person2:You means she didn ' t marry a rich man .
Person1: He ' s a postman .
Person2:I thought she would marry a fortune .
A:
informal