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:       What's your name ?  
 Person2:My name is Wang Lin . My English name is Linda .  
 Person1:        A nice name , isn't it ?  
 Person2:Yeah , like it very much . My name has become a part of me .  
 Person1:        Where do you live ?  
 Person2:I live in the Haitian District .  
 Person1:        Oh , It's really far from here . May I ask how old you are ?  
 Person2:Yes , I ’ m 38 years old .  
 Person1:        You look very young .  
 Person2:Thanks .  
 Person1:        Where is your birthplace ?  
 Person2:My birthplace is Yentai . 

informal