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:       Oh , the ink is spilled on the desk .  
 Person2:Did it spill on your clothes ?  
 Person1:        No , but the table cloth was dirty .  
 Person2:That's OK .  
 Person1:        I'm afraid it's too hard to wash off the stain .  
 Person2:It's no big deal .  
 Person1:        I really feel great shame . Let me buy a new one for you .  
 Person2:Don't be silly , forget about it . 

informal