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:       You wouldn't believe what happened to me today . 
 Person2:What ? 
 Person1:        The teacher asked me to make a speech in English class and I wasn't prepared . He punished me by making me stand in front of the whole class . It was so embarrassing . 

formal