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:       Do you think I should ask Bob to help ? Will he come ?  
 Person2:No problem . You know him . He ’ s the kind of guy that ’ s always willing to go the extra miles .  
 Person1:        That ’ s right . But I have bothered him several times .  
 Person2:I bet he will come . 

formal