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:       Day , I'm home .  
 Person2:Do you have any homework today ?  
 Person1:        I'll do it later .  
 Person2:Go and do it now .  
 Person1:        Can I have some cookies first , please ? 

formal