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:       Hey , How's it going ?  
 Person2:Not good . I lost my wallet .  
 Person1:        Oh , that's too bad . Was it stolen ?  
 Person2:No , I think it came out of my pocket when I was in the taxi .  
 Person1:        Is there anything I can do ?  
 Person2:Can I borrow some money ?  
 Person1:        Sure , how much do you need ?  
 Person2:About 50 dollars .  
 Person1:        That's no problem .  
 Person2:Thanks . I'll pay you back on Friday .  
 Person1:        That'll be fine . Here you are .  
 Person2:What are you going to do now ?  
 Person1:        I'm going to buy some books and then I'm going to the gas station .  
 Person2:If you wait a minute I can go with you .  
 Person1:        OK . I'll wait for you . 

informal