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:       Hi , Jack . Long time no see !  
 Person2:Yeah . How's everything going ?  
 Person1:        Not bad . At least I am still alive .  
 Person2:Just alive ? I guess you are some lucky guy . I heard you are going out with Jane .  
 Person1:        Where did you get that idea ?  
 Person2:Oh , come on . Jane is a very nice girl , someone you meet only once till lifetime .  
 Person1:        You are right . I am not boasting , but she is really as beautiful as she is intelligent .  
 Person2:Well , I really envy you for finding such a nice girl . 

informal