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:       Would you like to order now ? 
 Person2:Yes , can you recommend some steak ? 
 Person1:        Sure . I think pepper steak is quite good . Many guests like it very much . 
 Person2:OK I will try it . Do you have a small portion ? I am afraid I can't finish the large one . 
 Person1:        Yes madam . I will give you the small one . 

formal