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:       you haven't spent much time with Sophia lately . Are you speaking to each other at the moment ?  
 Person2:no , we're not . We've been drifting apart for a while .  
 Person1:        but you two used to do everything together . I thought you really enjoyed each other's company .  
 Person2:we did , but since she started her new job , all she does is hang out with her new friends from work .  
 Person1:        can't you hang out with them , too ?  
 Person2:I could , but all they ever talk about is work , so I always end up feeling left out .  
 Person1:        maybe you should invite her over for dinner , so it's just the two of you .  
 Person2:I tried that a few weeks ago and she ended bringing a pal from work with her ! She's so busy these days that it's just impossible to hang out with her .  
 Person1:        it can't be that bad . She was always a really good friend to you .  
 Person2:you're right . She would never talk about me behind my back or hold a grudge . But she just doesn't seem very interested in our friendship anymore .  
 Person1:        she's probably just excited about her new job . You should give her some time . It would be a shame to lose such a good friend .  
 Person2:I've given her enough time . I'm over it now .  
 Person1:        I still think you two should try to patch things up .  
 Person2:I think I just have to accept the fact that it's time for us to go our separate ways . 

formal