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:       Adam , I'm sorry !  
 Person2:But where have you been , Alice ? You're over an hour late .  
 Person1:        Yes , but I couldn't help it . I was late getting off work for a start , and then I missed the bus . The bus I did catch got caught in a traffic jam . It was one thing after another .  
 Person2:But why were you getting off work so late ? The office close at six , doesn't it ?  
 Person1:        Yes , but there's a rush on at the moment , and my boss asked me to do some urgent letters .  
 Person2:But didn't you tell him you had an appointment ?  
 Person1:        Well , no . I thought I'd finish in about five minutes , and I didn't want to be difficult about just a few minutes . If it hadn't been for missing the bus and the traffic , I wouldn't have been so late . I'm sorry .  
 Person2:Well , you're here . And that's the main thing . 

informal