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 Rachael , what's up ? How is your day ?  
 Person2:Not bad.We have had a big meeting today , remember ?  
 Person1:        Oh , yea . I forgot.So how did it go ?  
 Person2:Pretty well . I think the boss liked my ideas .  
 Person1:        Great , so what happens now ?  
 Person2:Well , I have to write the proposal . I'm pretty excited about it . 

informal