Given the task definition and input, reply with output. 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'.

Person1: I hear you're moving to New York .
Person2:Yes , I found a very good job down there .
Person1: Well , we'll certainly miss you in Boston .
Person2:I'm going to miss you folks , too .
Person1: Let's keep in touch .
Person2:OK . I'll drop you a line as soon as I get there .
informal