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:       You have got a problem , haven't you ?  
 Person2:Yes . I am getting fat . What should I do ?  
 Person1:        Eat less and exercise more . Do not eat too much sweet food . 

formal