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:       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 . 

formal