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:       Hello , John . How are you ?  
 Person2:I'm fine , thanks . And you ?  
 Person1:        Very well , thanks . Nice to see you again . I haven't seen you for a long time . What have you been doing lately ?  
 Person2:Oh , nothing much really . And how is everything with you ?  
 Person1:        Fine , thanks . I've been busy lately .  
 Person2:What have you been doing ?  
 Person1:        I've been studying for my exams . My school exams will begin next month .  
 Person2:Really ? Good luck for them .  
 Person1:        Thanks . And how are your parents ?  
 Person2:They're both very well , thanks .  
 Person1:        Where are you going now ?  
 Person2:I'm going to do some shopping.Why don't you come with me ?  
 Person1:        I can't . I have to meet someone .  
 Person2:It's been nice talking to you .  
 Person1:        Good-bye . See you again sometime . 

informal