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:       Could you just hold this for me ?  
 Person2:What are you doing ? Is anything wrong ?  
 Person1:        Yes , but I've nearly fixed it . Just take it , will you ?  
 Person2:Oh , yes , of course . I'm sorry-I wasn't thinking ... 

formal