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:       What's your name ?  
 Person2:My name is Sam .  
 Person1:        How are you , Sam ?  
 Person2:I'm fine . Thank you .  
 Person1:        Where are you from , Sam ?  
 Person2:I'm from England .  
 Person1:        What is your job ?  
 Person2:I'm a bank manager . 

informal