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:       Is English acceptable for you ?  
 Person2:Yes .  
 Person1:        What's your name ?  
 Person2:Jenny Madison .  
 Person1:        What ’ s your nationality ?  
 Person2:Nigerian .  
 Person1:        What is your date of birth ?  
 Person2:15th of April , 1969 .  
 Person1:        And your occupation ?  
 Person2:I am a painter .  
 Person1:        What's your passport No . ?  
 Person2:7834623464 3367 .  
 Person1:        Where do you live in China ?  
 Person2:In the Golden Mountain Hotel in Beijing .  
 Person1:        You are suspected of smuggling . Do you understand your rights ?  
 Person2:Yes .  
 Person1:        Ok , sign here . 

formal