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:       Well , Peter . I'm sorry you're ill . What's the matter with you ?  
 Person2:I don't know , Doctor . I'm ill . I have a headache and a stomachache .  
 Person1:        Show me your torgue.What did you eat yesterday ?  
 Person2:Well , Doctor , I . . .  
 Person1:        Did you eat any cake ?  
 Person2:Yes , I ate some cake .  
 Person1:        Did you eat any ice cream ?  
 Person2:Well , yes , I did . I ate some ice cream .  
 Person1:        Did you eat any candy ?  
 Person2:Well , yes , I did . I ate some candy .  
 Person1:        Young man , tell me everything you ate yesterday evening .  
 Person2:weki , Doctor . I went to a birthday party .  
 Person1:        I see ! How many pieces of cake did you eat ?  
 Person2:Three , Doctor .  
 Person1:        How many plates of ice ream did you eat , young man ?  
 Person2:Gosh , Doctor . I had only three plates of ice cream.John had four . 

informal