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:       I think we should home school our children when we decide to have kids .  
 Person2:What ? Why ?  
 Person1:        Well , our public schools here are not very good and private school are just too expensive . I have been reading up on home schooling and it has a lot of advantages .  
 Person2:Like what ? I think that by doing something like that we would be isolating our children from social interaction .  
 Person1:        Well , first of all , I would be able to teach them everything they learn in school in a more relaxed and fun way . I also think that having a one-on-one class is much better since you can focus more on his or her strengths or weaknesses .  
 Person2:I think neither your parents or mine would agree to such an idea .  
 Person1:        I will bring it up over Sunday brunch .  
 Person2:Good luck with that ! 

informal