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:       Do you still see the people we went to school with ?  
 Person2:I did for a while , I suppose , until I left university , but after that not really .  
 Person1:        Yeah , I've lost touch with most people as well , but I still see Rose occasionally .  
 Person2:Oh yes , how's she getting on ?  
 Person1:        OK , I suppose , but she's had a rough time in the last few years , She got divorced .  
 Person2:What , from Peter ?  
 Person1:        Oh , of course . 

formal