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:       Do you take reservations ? 
 Person2:Of course . Reservations aren't necessary , but we recommend them as our restaurant can get quite busy . 
 Person1:        I need a table for two for tonight . 
 Person2:What time ? 
 Person1:        We'd like to be seated at 8p m . 
 Person2:Smoking or non ? 
 Person1:        Non-smoking . 
 Person2:What name is the reservation under ? 
 Person1:        My name is Paul . 
 Person2:Ok . Please arrive at seven forty-five . We can only hold the table until 8,15 . 

formal