Definition: 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: Is there anything I can do ?
Person2:Yes . I am thinking of a tour to Australia .
Person1: May I recommend the popular route ? It's a seven days ' trip and cost $ 500 .
Person2:That's really cheap . What are the fees included ?
Person1: Everything , sir , including the air tickets , accommodation and gate tickets .
Person2:OK , I will take the tour .
Output:
formal