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:       Where is Tom ?  
 Person2:He is in the bedroom and fallen asleep .  
 Person1:        What ? It ’ s only 9p . m . Now . Why today he went to bed so early ?  
 Person2:He ran four miles and came back dead beat .  
 Person1:        Oh , I see . 

formal