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:       Good morning , sir . Welcome to Flower Hotel .  
 Person2:Thank you .  
 Person1:        How many pieces of baggage do you have ?  
 Person2:Three . Would you please help us take them to the hall ?  
 Person1:        Surely , of course . 

formal