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:       What do you think of this suit ? Do I look good or what ?  
 Person2:You look great ! However , I think you are a little over dressed for dinner .  
 Person1:        Didn't they say we're going to the Ritz ?  
 Person2:Yes , but not the Ritz Carlton , the " Ritz " is a pizza place with peanut shells on the floor .  
 Person1:        In that case , let me make a quick change into my street clothes .  
 Person2:I'll wait right here for you Superman .  
 Person1:        Ta da ! Let's go to the Ritz !  
 Person2:Can we go to the Carlton next time and can you wear that fabulous suit ? 

informal