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:       Hi , Nicole . Did you have a good weekend ?  
 Person2:Yes , I did . But I feel tired today .  
 Person1:        Really ? Why ?  
 Person2:Well , on Saturday I cleaned the house and played tennis . Then on Sunday I hiked in the country .  
 Person1:        And I bet you studied , too .  
 Person2:Yeah . I studied on Sunday evening . What about you ?  
 Person1:        Well , I didn't clean the house and I didn't study . I stayed in bed and watched TV .  
 Person2:That sounds like fun , but did you exercise ?  
 Person1:        Sort of . I played golf on my computer ! 

informal