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:       Yeah , I ’ Ve just moved here , and I ’ d like to activate my cell phone , and I ’ m not sure if I should go with a prepaid plan , or a monthly rate plan .  
 Person2:I see . Well , can I have a look at your phone ? Unfortunately , this phone can ’ t be used in the US , it ’ s not compatible with our 3G network .  
 Person1:        What ? Really ? I don ’ t really want to have to buy a new phone .  
 Person2:Well , you ’ re in luck ! You see , if you sign up for our three-year plan , we ’ ll throw in a handset for free .  
 Person1:        Really ? What ’ s the catch ?  
 Person2:There ’ s no catch ! You just choose a plan , sign a three-year contract and , that ’ s it ! Actually , we ’ re running a special promotion right now , and we ’ re giving away a Blackberry Curve with our special Mega Value forty dollar plan .  
 Person1:        So what does this plan include ?  
 Person2:Well , you get nine hundred anytime minutes , and you can also enjoy free mobile to mobile calling to other Tel-Mobile clients , one thousand text messages per month , and unlimited evening and weekend minutes . Oh , and we also offer a rollover option .  
 Person1:        Wow , all this for forty dollars per month ?  
 Person2:That ’ s right , plus the activation fee , the emergency services fee , the monthly service fee , oh , and any charges for extra minutes , and ... 

informal