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 . I am Bili and I made an appointment with you to see the house .  
 Person2:Glad to meet you . This way , please .  
 Person1:        The house is a little too old .  
 Person2:But it's quite convenient for you to go to any part of the city . The subway is nearby .  
 Person1:        Yes . That's why I like the house . 

informal