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:       There are so many flavors of ice cream to choose from !  
 Person2:Yes , there must be about a hundred . Do you have a favorite ?  
 Person1:        I love fruit flavored ices the best .  
 Person2:I know , fresh fruit flavored is the best ever .  
 Person1:        What is your least favorite ice cream ?  
 Person2:I don't like peppermint ice cream .  
 Person1:        Yeah , I know what you mean .  
 Person2:One time , I tried garlic ice cream .  
 Person1:        That could be interesting .  
 Person2:That doesn't sound like a good choice for today though . Let's order ! 

informal