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:       Hey , you ’ re early ! Where ’ s everyone ?  
 Person2:Well ... I told them not to come . I made a reservation just for the two of us . I thought we could have an quiet evening all to ourselves .  
 Person1:        Oh ... why ?  
 Person2:Jennifer , there ’ s something I wanna ask you .  
 Person1:        Sure . What is it ?  
 Person2:Hmm ... okay , here ’ s the thing . I ’ Ve always seen you as more than just a friend , and I can ’ t take it any more . I know you better than anyone , I know the pros and cons of your personality , I even know what side of the bed is yours ! I think we would be great together , don ’ t you ?  
 Person1:        Are you serious ? We ’ Ve been friends for years ! We can ’ t just change that overnight !  
 Person2:I know ! I never had the guts to tell you ... until today . So , what do you say ? Are you willing to give me a shot ?  
 Person1:        I ... I ... 

informal