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:       Have you been in America long , Hellen ? 
 Person2:No . Only for a couple of weeks . 
 Person1:        Where are you going to study ? 
 Person2:I am going to register at Harvard next month . 
 Person1:        What are you going to major in ? 
 Person2:I am going to major in tourism . What about you ? How long have you been here ? 
 Person1:        For nearly four years . 
 Person2:Well . You should be able to give me some advice on where to stay . At the moment , I am staying in a hotel which is far away from the school . 

formal