Given the task definition and input, reply with output. 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'.

Person1: Good evening , ma'am . May I help you ?
Person2:Yes . I'd like to use a safety deposit box .
Person1: Will the object fit into this size of box ?
Person2:Let me see . I think it's OK .
Person1: Could you fill out this form , please , ma'am ?
Person2:Here you are .
Person1: Thank you , ma'am . Would you like to use it until May 20th ?
Person2:Yes .
Person1: This way , please . Your box number is 522 .
Person2:Thank you .
Person1: If you would like to use the contents during the period of use , please come here in person . After confirming your signature , we will open the box .
Person2:I see . Thank you .
formal