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:       So , got any more ideas for the website ?  
 Person2:Well , since we're collecting gifts instead of red envelopes , I made a " for guests only " gift chat room .  
 Person1:        But we registered at Macy's . People can just buy gifts there .  
 Person2:The Taiwanese won't have time to buy gifts in America . The chat room is more convenient .  
 Person1:        You're right . They can discuss what to get and avoid buying the same things .  
 Person2:Or discuss what gifts they could buy together .  
 Person1:        Any other ideas ?  
 Person2:We can also put a guest book on the website for people to sign and write comments .  
 Person1:        And we were going to make a collage for each of us using our baby pictures ...  
 Person2:Yeah , that will be the best part . Jack hasn't seen yours yet , right ?  
 Person1:        No . He has no idea what a fat little pig I was ! 

formal