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:       Can you tell me the time ?  
 Person2:It's 5:30 by my watch .  
 Person1:        Is your watch right ?  
 Person2:Yes . There's only a few seconds in a whole month . 

formal