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:       If one is rich , is the happy ?  
 Person2:I don't think so.It ' s impossible to equate wealth and happiness .  
 Person1:        Could I understand what you said as the poorest is the happiest ?  
 Person2:Of course not.Sometimes a poor man can be extremely miserable . 

formal