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:       Peter , which club do you want to join ?  
 Person2:I haven't decided yet . What about you , Andy ?  
 Person1:        I am a member of the basketball club . Do you want to join us ?  
 Person2:But I don't know how to play basketball .  
 Person1:        It's OK . Don't worry about it . Our school coach will train us to play basketball . 

formal