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:       Hello , what can I do for you ?  
 Person2:Can you repair my shoes ?  
 Person1:        No problem . No matter what ’ s wrong with it , I can surely meet your satisfaction .  
 Person2:Really ? Look at the toe of this shoe . It is worn out .  
 Person1:        Oh , here . I ’ m afraid it ’ ll be difficult to repair .  
 Person2:Can you do it ?  
 Person1:        Yes , I can . To tell you the truth , I ’ m the best nearby . 

formal