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:       We'd like a half-day package . 
 Person2:We offer many different sea water treatments . 
 Person1:        How many can we choose ? 
 Person2:The aquamedic pool is included . You can choose three . 
 Person1:        We'll do the seaweed wrap , the jet bath , and the foot massage . 
 Person2:OK . Here are your robes . You can go shower first . 

informal