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:       Excuse me ? Do you have anything for a carsickness ?  
 Person2:Yes , but you look fine .  
 Person1:        Oh , it's for my brother . The little boy over there . He is getting a carsickness .  
 Person2:Poor boy ! But don't worry . Here are two pills made in Germany . It's really effective . He will be just fine .  
 Person1:        Thank you so much .  
 Person2:Take some with you next time , just in case .  
 Person1:        Sorry to interrupt , but my brother is still sleeping .  
 Person2:You mean the boy who felt carsick just now ?  
 Person1:        Yes . It's so strange that he slept all the time after taking the pills .  
 Person2:Oh , sorry , maybe I gave you the wrong medicine .  
 Person1:        What ?  
 Person2:It's just sleeping pills made in America which is also very good . But don't worry . It has no undesirable side-effects .  
 Person1:        I see . 

informal