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:       Hello , is it necessary to do warm-up exercise ? I can't wait to dive into the water . 
 Person2:I'm sorry . Every customer coming here must do the warm-up exercise before getting down to swimming . That's out regulation . 
 Person1:        Yeah , I see . You are just doing your job . But I wanna know what the advantages it has . 
 Person2:OK , lovely boy . Try to be patient . Do you know the danger of swimming without warm-up ? 
 Person1:        As far as I know , people will be weak if they swim too long . 
 Person2:That's right . But the most dangerous thing is that their legs may spasm out of control when swimming . 
 Person1:        Is it very dangerous ? I'm a little scared . Do you offer the lifebuoy for us ? 
 Person2:Yes , besides that , we also provide our customers with goggles , swimming suit and something like that . 
 Person1:        Do you have the workers to save me if anything should happen ? 
 Person2:Of course , all the workers here are able to swim , and they will come to your aid quickly . 

formal