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 are you calling about today ?
Person2:I scheduled a delivery for tomorrow .
Person1: Is there a problem ?
Person2:I would like to reschedule .
Person1: That shouldn't be a problem .
Person2:Can I have it delivered the day after tomorrow ?
Person1: So , you want it delivered the day after tomorrow ?
Person2:Yes , will that be possible ?
Person1: What time would you like us to deliver it ?
Person2:Is 2:30 Okay ?
Person1: Your delivery has been confirmed .
Person2:Thank you , and I'm sorry for the change of plans .
Output:
informal