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: I have an appointment for half past one .
Person2:What can I help you with ?
Person1: Well , I have a problem with my class schedule .
Person2:What is it ?
Person1: It seems that I've been given two classes scheduled at the same time .
Person2:I can understand the problem with that .
Person1: Is there any way that you can fix my schedule ?
Person2:No problem , do you want those classes still ?
Person1: Yes , I do .
Person2:Let me see if I can find one of these classes on another day .
Person1: Thank you very much .
informal