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:       What do you think of the Olympic motto ' Higher , faster and stronger ' ? 
 Person2:Well , it's better than ' Friendship first , competition second ' . 
 Person1:        Why ? In my opinion , it doesn't matter whether you won or not . The most important thing is participation . 
 Person2:I still think nobody plays for nothing . 

formal