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:       What day is it ? 
 Person2:It's Monday , October 27 . Speaking of dates , when are you leaving ? 
 Person1:        I'm leaving on November 10th . 
 Person2:Isn't it a Sunday ? 
 Person1:        No , it's a Monday . 
 Person2:So you are leaving two weeks from now ? 
 Person1:        Right . 

formal