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:       I heard you are going to move .  
 Person2:Yes , I found a better house near my office . I ’ m very satisfied with it . But I ’ m worrying .  
 Person1:        What are you worried about ?  
 Person2:I ’ m worrying about how to move all of my household stuff . You know , I have a lot of stuff .  
 Person1:        You can call a mover .  
 Person2:How much dose that cost ?  
 Person1:        Around 200 RIB for a truck .  
 Person2:I think it ’ s a little expensive .  
 Person1:        But think about it , you just need to pack your stuff and leave everything for the movers , how much trouble you will save .  
 Person2:That ’ s right .  
 Person1:        I know a mover which has a very good reputation for their service . I ’ ll leave you their phone number .  
 Person2:Wonderful .  
 Person1:        It ’ s 8357688 8 .  
 Person2:Okay , thanks a lot . You did me a great favor just now .  
 Person1:        You ’ re welcome . 

informal