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:       William told you that his grandmother is sick , huh ? What exactly did he say ? 
 Person2:He said his grandmother got cancer and has only a few weeks to live . It's really so sad ! But when I talked to him on the phone , it sounded like he was holding up really well . 
 Person1:        It didn't sound like he was too upset , huh ? What did you tell him ? 
 Person2:I asked if there was anything I could do to help his family , and I told him that I could be a shoulder for him to cry on . 
 Person1:        Well I hate to tell you this Jen , but both of William's grandmothers passed away more than five years ago . 

formal