Instructions: 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: What can I do for you ?
Person2:I need to make a deposit .
Person1: Are you depositing cash or a check ?
Person2:I ' m depositing a check .
Person1: Please sign the back of the check .
Person2:There you go .
Person1: Do you want cash back ?
Person2:Yes , please .
Person1: How much cash would you like ?
Person2:I want $ 150 .
Person1: Here ' s your $ 150 .
Person2:Thank you , and have a nice day .
Output:
informal