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'.

Example Input: Person1: Well , tell me something of yourself .
Person2:What would you like to know , Mr . Green ?
Person1: What working experience have you got ?
Person2:In 2004 , I got a job in the sales department of a trading company near Guangzhou . I started a sales representative . A year later , I was promoted to the position of sales manager . I had that job ever since , which is just over a year now .
Person1: Oh , good . Irene , can you tell me why you plan to quit being a sales manager to work here as my assistant ? Don't you like your present job ?
Person2:Frankly , some part of it I enjoy very much , but I prefer something more professional . It happens that I have a friend working here in this company . She told me the export department was to recruit an assistant . I felt very excited at this news . That's why I'm here .
Example Output: formal

Example Input: Person1: Lucy , where are you going ?
Person2:I want to go to the supermarket .
Person1: Wait a few minutes and I'll go there with you .
Person2:Let's get a shopping cart .
Person1: Good idea
Person2:What are you going to buy ?
Person1: Let's check out the fruit section first .
Person2:OK . I'd like some oranges . But they don't look quite ripe yet .
Person1: Look , nice fresh cherries ! They are ripe and soft . I'll take some .
Person2:I'll take some , too .
Person1: Let's go to the snacks section . I want some chocolate and sweets .
Person2:OK . I'll go and buy some cakes .
Person1: Do you want to buy something else ?
Person2:No . Let's go over to the check-out stand .
Example Output: informal

Example Input: Person1: There is a new coffee shop opening up down the street .
Person2:I hope that they have a good menu . Most coffee shops only have coffee and Danish .
Person1: That's right . You don't drink coffee , do you ?
Person2:No , so it's usually boring to join my friends in the afternoon at a regular coffee shop .
Person1: What kind of things would you like to see on the menu ?
Person2:Maybe a fruit salad and a few different hot sandwiches at least .
Person1: That shouldn't be too difficult . Since this is a small neighborhood , maybe they will take this suggestion .
Person2:Let's try it !
Example Output:
formal