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 , Mike . We're having a party tonight , wanna come join us ? You can bring your girlfriend .  
 Person2:Well . I am breaking up with Cathy .  
 Person1:        What happened ? Did you have a fight ?  
 Person2:No . She is really a very nice girl ...  
 Person1:        Yeah , she is . She is pretty , caring , getting easy-going and she is a great cook . She is a gem .  
 Person2:Well , you are right . But sometimes she is too caring . Well , no ... she ’ s just possessive and I kind of want a break ... you know ... for some room for myself .  
 Person1:        Oh ? ! Did you talk with her about it ?  
 Person2:I've tried , but it didn't work .  
 Person1:        So , when are you going to tell her ?  
 Person2:Maybe tonight . I don't know . I don't know how to tell her .  
 Person1:        I know she ’ s head over heels in love with you . She will be badly hurt !  
 Person2:I know ... 

informal