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:       so , your friend ’ s getting married on Saturday . What have you bought her as a wedding gift . I find is so hard to choose the right gift .  
 Person2:my friend and her fiance had a really good idea . They have cut out pictures from catalogues and pasted them in a notebook . The picture are of things they want . People sign their name b  
 Person1:        that ’ s clever ! Then everyone knows that they are buying something the couple really want and there ’ s no chance of two people buying the same gift . What things were in the notebook ?  
 Person2:most of the things were household appliance . You know , everything from an iron through a vacuum cleaner to a cooker . I think it ’ s an excellent way for everyone who knows the couple to help  
 Person1:        so , what did you get them ?  
 Person2:I bought a sewing machine . I know that my friend likes making her own clothes , but her current sewing machine is quite old and has some problems .  
 Person1:        what ’ s wrong with is ?  
 Person2:she says that after several years of use , it ’ s not working properly . When she uses it , it makes a funny noise .  
 Person1:        household appliance don ’ t seem to last for a long time nowadays .  
 Person2:I think it ’ s because the manufactures are constantly bringing out new models . Because they know that we will buy the new models , the appliances don ’ t need to last more than five or ten year 

formal