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: Will we drive to the seaside ?
Person2:Yes , it will take about four hours . We can leave about noon and get there by supper time .
Person1: Let me help pay for gas .
Person2:All right . There will be three of us going so we will each pay a third .
Person1: What other expenses will we have ?
Person2:There won't be many other expenses expect food .
Output:
informal