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 was supposed to meet with you at half past one .  
 Person2:Yes , I see . What did you need to see me about ?  
 Person1:        There's a problem with my schedule .  
 Person2:What's the problem ?  
 Person1:        Two of my classes occur at the same time .  
 Person2:Well , I can see that's a problem .  
 Person1:        Is it at all possible for you to fix that error ?  
 Person2:Yes , I can . Would you still like to have both of these classes ?  
 Person1:        I want to keep both of them , if that's possible .  
 Person2:Well , let me find you one of these classes on a different day .  
 Person1:        Thanks a lot . 

informal