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:       I'll see you in Sterlet , then .  
 Person2:Where did you say ?  
 Person1:        Sterlet . It's spelt 0 , S , T , E , R , L , E , Y .  
 Person2:Right . 

formal