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:       You married Joe , didn't you ?  
 Person2:Joe ? I don't know what you mean .  
 Person1:        I remember you are in love .  
 Person2:Oh , I took a shine to him when we met for the first time . But it comes and goes .  
 Person1:        It's Greek to me . 

formal