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'.
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Question: Person1: I've come to say good-bye .
Person2:When are you off ?
Person1: I'm flying home on Sunday afternoon .
Person2:Well , good-bye . See you soon .
Person1: Please don't forget to say good-bye to the rest of the family for me .

Answer: formal

Question: Person1: What can I do for you , Ma'am ?
Person2:I want to buy a cell phone for my daughter .
Person1: How old is she ?
Person2:She is 17 . It's for her birthday .
Person1: We have a new-fashioned cell phone especially designed for young girls . The brand name is Nokia .
Person2:Thanks , but I want to have a look at the Motorola's products .
Person1: Sure . This is the one I will not hesitate to recommend . Its color and style is so attractive and also the quality is really reliable .
Person2:Sounds perfect . I'll take the pink one . Can you pack it for me ?
Person1: Sure . By the way , here are some free adornments . Would you like one ?
Person2:Why not ? The Sweetheart pendant matches the cell phone well . I'd take this one .
Person1: Have a seat over there . I'll pack it up for you right away .
Person2:Thanks .

Answer: informal

Question: Person1: If you wanna keep healthy , you must give up smoking . It's extremely bad for your health , you know .
Person2:I know it's not good for me , but the problem is I just can't help it .
Person1: Well , I've got an idea , put the label cancer sticks on each pack of cigarettes , and read it before you smoke . It may give you a feeling to reduce it .
Person2:I'll try .

Answer:
informal