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: Hello , Rachel . It's glad to see you here .
Person2:Hi , Ross . Glad to see you , too .
Person1: I'm going to throw a party tomorrow night . Would you like to come ?
Person2:A party ? Yes . I'd love to . Thank you for inviting me . Will Monica come ?
Person1: Of course .
Person2:That's great ! What time will it start at ?
Person1: At 6 o'clock .
Person2:OK . I'll come . See you then .
Person1: See you .
Output:
informal