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 , I don't feel good right now .  
 Person2:What can I do for you ?  
 Person1:        Do you have any pills for airsickness ?  
 Person2:Here you are . Take one at a time .  
 Person1:        Please fetch me a glass of water . Thanks .  
 Person2:You are welcome . 

formal