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:       We did a survey on your job performance .  
 Person2:How did I do ?  
 Person1:        Not so good . Lots of complains .  
 Person2:Really ? I thought I was doing well .  
 Person1:        Your performance so far is not quite in line with what we expect for our executives . I hope I ’ Ve made my point . 

informal