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 . Excuse me while I go and get that . 

informal