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:       Dad , I want to learn how to drive this summer vacation .  
 Person2:That's a good idea . You'd better hurry up before they've filled all classes . Many people are learning how to drive now .  
 Person1:        I will get registered now at once . Do you know any training schools ?  
 Person2:I am not sure . You can search for them on the Internet .  
 Person1:        OK . look , I've typed driver schools , and there are so many results coming out .  
 Person2:Let me see . teetee Training School , summer program , 3,000 Yuan , learn how to drive within one month , and get driver's license within three months .  
 Person1:        3,000 Yuan is a little bit steep .  
 Person2:I think so . Let's see the next one , 3,500 Yuan , summer program . Forget it .  
 Person1:        I've heard that the Ideal Life School is famous . They offer many programs and there are many classes available . The charge is also fair .  
 Person2:Search on the Internet then , see if we can find something more about it .  
 Person1:        Ah , got it . Ideal Life School , programs  
 Person2:Don't worry . Let's check out some other schools . 

informal