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:       Thanks for offering to give me a lift . I ’ m looking forward to this party , but I didn ’ t want to go alone . 
 Person2:Don ’ t mention it . It ’ s my pleasure . Have you been to one of these large , sit-down dinner parties since you got to New Haven ? 
 Person1:        No , this is my first.Last week I went to a cookout for new professors at Dean Barksdale ’ s home . I took a taxi because I didn ’ t want to be late.But I was the first one 
 Person2:Cookouts often start slowly . A two o ’ clock start means you arrive any time after two . 
 Person1:        Thanks for telling me this . 
 Person2:I was late getting back from the mall , but I ’ m hurrying . 
 Person1:        Why are you in such a hurry ? They said , Dinner at eight , and it ’ s only seven-fifteen . I don ’ t want to be the first one there again . 
 Person2:Don ’ t worry . We won ’ t be the first . 

informal