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:       hi , come on in . Can I take your coat ?  
 Person2:sure , thanks . I brought you a bottle of wine as well .  
 Person1:        you're the first guest to arrive . I'll just put your coat away and then I'll get you something to drink .  
 Person2:should I take my shoes off ?  
 Person1:        whatever you prefer .  
 Person2:this is a very nice place . How long have you been living here now ?  
 Person1:        just over three weeks . Would you like a drink ?  
 Person2:sure , what do you have ?  
 Person1:        I've got white wine , red wine , gin and tonics , ginger ale , lemonade , orange juice , and sprite .  
 Person2:I'll have a glass of red wine please .  
 Person1:        one glass of red wine coming up !  
 Person2:so how many people are coming for the dinner tonight ?  
 Person1:        there's just going to be 6 of us tonight .  
 Person2:oh , I thought there were going to be eight . who isn't coming ?  
 Person1:        Marcia and Paul called to cancel at the last moment . Paul was running late and Marcia wasn't feeling well .  
 Person2:that's too bad.They ' re such good company .  
 Person1:        I think there's someone at the door .  
 Person2:excuse me while I go and get that . 

formal