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:       Lisa , I'm home .  
 Person2:How was your day ?  
 Person1:        Pretty good . I've made a few friends already .  
 Person2:Anybody I know ?  
 Person1:        Well , Pam Franklin lives next door to us . By the way , can I go to her house this Saturday ?  
 Person2:Of course . You didn't have to ask me .  
 Person1:        That's what Pam said .  
 Person2:Just don't stay out too late . 

formal