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:       I would like to have this laundry done . 
 Person2:Please fill out the form first . 
 Person1:        OK . By the way , I would like to have this sweater washed by hand in cold water . It might shrink otherwise . 
 Person2:By hand in cold water . Got it . 

informal