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: Consider Input:  Person1:       Can you tell me the time ? I've got an appointment at 8: 30 .  
 Person2:It's 8 sharp by my watch .  
 Person1:        Gee ! There's only thirty minutes to go . 

Output: informal


Input: Consider Input:  Person1:       Excuse me , sir ? I just need a little bit more information . Could you tell me your telephone number and mailing address ?  
 Person2:Sure . My number is 545-8897 , and I live at 908 Mulbury Street .  
 Person1:        That ’ s 545-8897 and your mailing address is 908 Mulbury Street . The zip code is 20310 , right ?  
 Person2:That ’ s right . 

Output: formal


Input: Consider Input:  Person1:       Can you tell which team seems to win ?  
 Person2:Hard to say . Now the score is in our favor .  
 Person1:        Yes . Our guest team is really tough .  
 Person2:They're still fighting hard . Let's wait and see . 


Output: formal


