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 , Juliet , I'm treating Mr.Li and his team members from Galp to dinner tomorrow evening.Where do you think I should take them ?  
 Person2:Well , Mr.Li has very good taste in wine , and Galp is one of the biggest clients . I suggest you take them to a decent French restaurant . Make sure you make a very good impression .  
 Person1:        That's a good idea . Which one do you recommend ? The Pairszone ?  
 Person2:Or Lapis . They are both listed this year glory magazine for have most of frantic Fetch cuisine in town . But I heard Lapis has a better wine selection .  
 Person1:        We'll go to the place . Could you book a table for 4 at 7 PM ?  
 Person2:Sure . 

formal