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:       Uh-oh . I'm in trouble .  
 Person2:Why ? What's wrong ?  
 Person1:        I just remembered that I've got to give a speech in class today and I forgot to prepare for it .  
 Person2:I guess you'll have to wing it . 

informal