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:       Wow , it all looks so good . I ’ m not sure what to choose .  
 Person2:I can recommend the spare ribs . They are very tasty here .  
 Person1:        Actually , I ate too much pork yesterday . I fancy a change .  
 Person2:Ok why don ’ t you order the braised fish then ?  
 Person1:        That sounds like a good idea . It looks very big though .  
 Person2:Don ’ t worry . I ’ ll help you eat it . 

informal