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:       Hey , Jenny . Would you like to go to dinner with me ?  
 Person2:I don't know . You know what they say about office romances .  
 Person1:        No , I don't . What do they say about office romances ?  
 Person2:They say you shouldn't mix love and work .  
 Person1:        That's silly . What I do on my own time is no one else ’ s business . Besides , it's pretty hard to meet people outside of the office when we spend long hours here .  
 Person2:You ’ Ve got a point . Once I dated one of my supervisors and all of my co-workers accused him of favoritism . Then when the relationship went bad , he fired me .  
 Person1:        People fall in love with people they work with . That's a fact .  
 Person2:That may be true , but I don't want an inter-office relationship to affect my productivity .  
 Person1:        If it does , it will only make you more productive , because we can support each other .  
 Person2:You are sounding like we are already married .  
 Person1:        Good grief . All I did was ask you out . I am sorry .  
 Person2:Well , I don't feel right about it .  
 Person1:        I am talking about dinner tonight , not a lifetime .  
 Person2:Most starts with dinner , but then it gets out of hand . Besides , haven't you asked out every woman in the entire office ?  
 Person1:        I like company .  
 Person2:Company ? I heard about you from Linda . She said you were an octopus !  
 Person1:        What can I say ? I am a passionate guy .  
 Person2:Well , I hope you can find something else to be passionate about .  
 Person1:        You want to go out with me and you know it .  
 Person2:In your dreams . Now if you don't mind , I've got some work to do .  
 Person1:        Ok , I get the message . Hey , do you have any sisters ? 

informal