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:       He has to deliver letters every day .  
 Person2:Poor man , he must be terribly fed up with it .  
 Person1:        Oh , no , he likes the job .  
 Person2:Oh , Really ? 

informal