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 have an appointment for half past one .  
 Person2:What can I help you with ?  
 Person1:        Well , I have a problem with my class schedule .  
 Person2:What is it ?  
 Person1:        It seems that I've been given two classes scheduled at the same time .  
 Person2:I can understand the problem with that .  
 Person1:        Is there any way that you can fix my schedule ?  
 Person2:No problem , do you want those classes still ?  
 Person1:        Yes , I do .  
 Person2:Let me see if I can find one of these classes on another day .  
 Person1:        Thank you very much . 

informal