Q: 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'.
 Person1:       How nice of you to come !  
 Person2:It's been a long time , hasn't it ? How have you been ?  
 Person1:        Just fine , thanks.And you ?  
 Person2:I've never been better , thanks . 
A:
informal