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:       I can't wait to go skiing tomorrow .  
 Person2:I know . It's going to be so much fun .  
 Person1:        I always get excited the day before .  
 Person2:I used to be like that . But I go skiing so often that I don't get excited anymore .  
 Person1:        I only go skiing twice a year , so it's a real treat for me .  
 Person2:That makes sense .  
 Person1:        What things make you excited ?  
 Person2:Whenever I go to Vegas , I get really excited .  
 Person1:        Oh ... that makes me excited too !  
 Person2:Looks like anything fun makes you excited . 

informal