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:       Would you mind doing something for me ?  
 Person2:I would if I could .  
 Person1:        Would you please explain the meaning of the word ?  
 Person2:Yes , With pleasure . 

informal