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 heard that your previous manager was very capable , he is a good manger .  
 Person2:That ’ s a matter of opinion .  
 Person1:        What do you mean ?  
 Person2:I worked with him for two years . That was the worst time in my career . 

informal