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:       Good morning , Mr Wang .  
 Person2:Good morning . What time is it now ?  
 Person1:        It's just nine o'clock .  
 Person2:I'm on time today  
 Person1:        Yes , you're on time . Are you often late ?  
 Person2:Yes , quite often .  
 Person1:        You must leave home earlier today .  
 Person2:No , I left home at 6:30 as usual .  
 Person1:        Why are you so early today ?  
 Person2:Because the traffic is not crowded . 

informal