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'm here for my appointment .  
 Person2:What can I do for you today ?  
 Person1:        I have an issue with my schedule .  
 Person2:Tell me the problem .  
 Person1:        I have two classes on here that are at the same time .  
 Person2:Oh , I see .  
 Person1:        Can you change that for me ?  
 Person2:Do you still want both classes ?  
 Person1:        Yes , I would like to keep both classes .  
 Person2:I'll try to change one to a different day .  
 Person1:        I would greatly appreciate that . 

informal