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:       OK , Devon , I've been putting on a few pounds and you're quite a lean fit guy . 
 Person2:Well , thank you . 
 Person1:        What do you recommend ? What can I do to lose weight ? 
 Person2:Well , I exercise a lot . I go running at least three times a week . But more than that I enjoy playing sports and so different sports use different muscles and all of it helps to lose that weight that you might have gained . 
 Person1:        Yeah , well , actually , one of the problems is that I actually exercise a lot . 
 Person2:Do ya ? 
 Person1:        Yeah , so maybe it's my diet . 
 Person2:It could be and so in that case you might want to eat something perhaps more nutritious or maybe even less of what you do eat . Maybe , I eat three meals a day and I try not to snack in between . No potato chips . No popcorn . No candy bars . 
 Person1:        That's pretty tough ! 

informal