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:       Daniel , I can't catch up with the English teacher very well .  
 Person2:What's the problem ?  
 Person1:        You are quite good at English , can you help me with it .  
 Person2:That's OK . But you'd better take an additional course in some English schools .  
 Person1:        English school ? What is that ?  
 Person2:This kind of school is good at helping people to improve their English .  
 Person1:        Is that different from our school's English course ?  
 Person2:Yes , before you start your training , they will test you on your English first . 

formal