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:       Good morning . I understand that you ’ Ve got a problem with your washing machine . I ’ m from the repair company .  
 Person2:Excellent . Come in please . The washing machine is in the bathroom upstairs . It keeps breaking down .  
 Person1:        When did it first break down ?  
 Person2:About ten days ago . I ’ Ve tried to use it since then . Sometimes it works and sometimes it doesn ’ t . it ’ s very frustrating .  
 Person1:        Is it still under warranty . If it is and I can ’ t fix it , it would be quicker and easier to exchange it for a new one .  
 Person2:Yes , it ’ s still under warranty . Over the last few weeks , it ’ s also been making a high-pitch noise when it ’ s in use .  
 Person1:        Ok . I ’ ll start by looking at the motor . I ’ ll just unplug it and take a look inside the machine ... oh , yes . There ’ s the problem . It ’ s quite simple . I ’ ll sort it out in a few minutes .  
 Person2:What ’ s wrong with it ?  
 Person1:        Part of the motor is loose . I can put it back in place quite easily .  
 Person2:That ’ s great . Thanks very much . Would you like a cup of tea or coffee ? 

informal