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:       Can we have dinner together sometime this weekend ?  
 Person2:Ok , you name the day .  
 Person1:        How about the second of March ?  
 Person2:What day is that ?  
 Person1:        It's Friday .  
 Person2:Good . Where shall we meet ? 

informal