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:       Good afternoon , may I help you ?  
 Person2:I have booked a table for 3 this evening . I would like to cancel it .  
 Person1:        May I have your name , please ?  
 Person2:Sure . Brown and we have reserved a table next to the door .  
 Person1:        Yes , I see . We will cancel your order . 

formal