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:       Daddy , I want to buy a ten-speed-sportsman .  
 Person2:How much is it ? Is three hundred dollars enough ?  
 Person1:        No , I'm not asking for money . I'm asking for your advice .  
 Person2:Oh , you've already grown up , son . 

informal