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:       Did you feed the puppies today ? 
 Person2:Yes , I have . 
 Person1:        That's good ! Just make sure to bathe them later . 
 Person2:No problem . I can do that for you . 
 Person1:        Thank you ! You know they have to go to the vet on Saturday ? 
 Person2:I know . What time do they go ? 
 Person1:        Their appointment is at eleven o'clock in the morning . 
 Person2:Okay , I won't forget . 

formal