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: Are you a newcomer ?
Person2:Yeah , this is my first visit here .
Person1: You speak good English , though .
Person2:Thanks , but I speak English with a strong German accent .
Person1: But let me tell you , you're doing just fine . I couldn't do half as well as you do when I was learning German . By the way , how long have you been learning English ?
Person2:On and off , for quite a few years .
informal