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:       So will you come to work with us ?  
 Person2:Can I use my green pad again to write you admiring notes ?  
 Person1:        We'll have to negotiate that . It's a possibility .  
 Person2:You miss me , don't you ?  
 Person1:        Don't push your luck , Dave .  
 Person2:OK , I'm in . When do I start ?  
 Person1:        As soon as you can get here . We'll be waiting for you . 

formal