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:       What time is it by your watch ?  
 Person2:I'm sorry , my watch has stopped .  
 Person1:        It's 2:42 by my watch . But it moves a bit fast .  
 Person2:Let's ask someone else . 

formal