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:       There are some things I miss . But I love Chinese food.And I think the people in Taiwan are really hospitable.Besides , I grew up in Los Angeles , so I'm used to living in crowded places.Why are you going to America ?  
 Person2:I'm going to New York to visit my sister . She is in art school . I've never been to New York before . I'm kind of scared .  
 Person1:        Why ?  
 Person2:Well , I know a lot of people have guns there . I think maybe it isn't too safe .  
 Person1:        Don't worry about it.Your sister lives there . She probably knows the places in town you shouldn't go.It ' s true there are some dangerous places in big American cities.But if your sister lives there , she must know the city pretty well already .  
 Person2:Yes , I'm not really scared . Maybe only a little .  
 Person1:        Don't believe what you see on TV . You will have a good time in New York.What things do you want to see ?  
 Person2:I want to see the museums , and I want to shop a lot .  
 Person1:        The museums are excellent . And the shopping ! Well ! I'm sure you'll spend a lot of money there .  
 Person2:Hmm . I hope not . 

formal