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:       This is how a holiday should be . Relaxing on the beach with a nice cool drink .  
 Person2:Isn ’ t it wonderful here ? The kids are enjoying themselves in the swimming pool . I hope it ’ s safe .  
 Person1:        Don ’ t worry about them . They ’ re very responsible . Besides , there are many people there and there ’ s lifeguard employed by the hotel . Waiter ! Could I have another drink pleas ? Thank you . So , what shall we do this evening ?  
 Person2:The kids said that they wanted to go to a party at the hotel . There ’ s a special one just for kids .  
 Person1:        So , we could try that restaurant that was recommended in the guidebook . Then we could go to a club . We haven ’ t been to one for ages .  
 Person2:That ’ s a great idea . We can really enjoy ourselves without worrying about the kids .  
 Person1:        Now , how about going for a swim in the sea ? We shouldn ’ t sunbathe all day . 

informal