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 would you like for your main course ?  
 Person2:Steak , please .  
 Person1:        How would you like your steak ? Rare , medium-rare or well-done ?  
 Person2:Well-done , please . 

formal