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 are you going to get a new swimsuit ?  
 Person2:Yeah , I think I'll get this one-piece .  
 Person1:        Why don't you get a bikini ?  
 Person2:I'm too fat for a bikini .  
 Person1:        You aren't fat . I'll bet you'd look great in a bikini . How about this thong bikini ?  
 Person2:I'll wear that if you'll wear these Speedos .  
 Person1:        I guess that one-piece isn't too bad , either . ( to be continued ) 

formal