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's the time ? My watch has stopped . 
 Person2:Let me see . It's five minutes to eleven . 
 Person1:        Is your watch right ? 
 Person2:I think so . I see it by the radio this morning . 

formal