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:       Welcome ! Sophia told us you were coming !  
 Person2:Um ... It's wonderful to be here . Uh ... this place looks really cozy .  
 Person1:        Thank you ! Your cheeks are as red as a tomato ! Are you shy ?  
 Person2:Maybe ...  
 Person1:        Some of my grappa will cure your shyness .  
 Person2:Is that a kind of alcohol ?  
 Person1:        It's a clear spirit we drink any time of the day . You will love it !  
 Person2:Great . My face will turn even redder ! 

informal