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:       Sorry.What was that you said ?  
 Person2:I'll meet you at the Gate round about seven .  
 Person1:        Where ?  
 Person2:At the Gate .  
 Person1:        When , did you say ?  
 Person2:Round about seven .  
 Person1:        Who's coming ?  
 Person2:Peter.Peter Brown , you know.Don ' t forget to bring the letter .  
 Person1:        Sorry . I didn't quite catch what you said.There ' s a lot of noise outside .  
 Person2:I told you not to forget to bring the letter .  
 Person1:        Loretta ? No , she can't come , she's busy . 

formal