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:       What shall we do after the volleyball match ?  
 Person2:How about going to the Olympic souvenir store to have a look ? I remember there is one in the gym .  
 Person1:        That's a good idea . I was thinking of buying some gifts for my family .  
 Person2:Me , too . What did you have in mind ?  
 Person1:        I haven't decided yet , but I think the Olympic Mascots are a must .  
 Person2:I agree . They're very lovely , especially Huanhuan  
 Person1:        Is that the red one ? That is my favorite , too . Do you know how much they are ?  
 Person2:The five dolls are sold together as a set , and they're priced according to the size . The bigger they are the more expensive .  
 Person1:        Oh , I see . If I buy more than a set , can I get any discount ?  
 Person2:I don't think so . All the souvenirs of the Olympic Games are very hot right now .  
 Person1:        Any other ideas ?  
 Person2:There are lots of things , such as postcards , key chains , posters and various arts and crafts .  
 Person1:        It all sounds great . We can go there after the match . I can't wait to see what they have . 

informal