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 , Sandy , what's new ? Interested in a movie tonight ?  
 Person2:I wish I could , but I'm busy . I'm going to work at a soup kitchen tonight .  
 Person1:        Soup kitchen ? Is that a new restaurant or something ?  
 Person2:Nah , it's a place where homelesspeople go to eat .  
 Person1:        How did you get involved in something like that ?  
 Person2:Well , the minister at my church told us about it , and it seemed interesting . I thought I'd try it once , and if I didn't like it I'd stop .  
 Person1:        So what do you do there ?  
 Person2:It's simple . All we do is prepare some food , usually sandwiches and some fruit , and give it out to them at the soup kitchen .  
 Person1:        Yeah , it sounds easy . How long does it take ?  
 Person2:Only about two hours , for a couple of days a month . Why don't you give it a try ?  
 Person1:        I don't know . I mean , I like helping the community and all that , but I don't know if I have the time ...  
 Person2:Come on , it's easy , and it'll make you feel good . Why don't you come with me tonight ? 

formal