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:       Excuse me , what's your name ?  
 Person2:My name is Jessica . What's yours ?  
 Person1:        John .  
 Person2:You speak English very well .  
 Person1:        Thank you .  
 Person2:Do you know what time it is ?  
 Person1:        Sure . It's 5:10 PM .  
 Person2:What did you say ?  
 Person1:        I said it's 5:10 PM .  
 Person2:Thanks .  
 Person1:        You're welcome . 

informal