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:       Do you have anything to wash ?  
 Person2:Yes . Here you are .  
 Person1:        OK . They will be ready by 7:00  
 Person2:By the way , please have these suits pressed .  
 Person1:        Of course , sir . We will press all the clothes when they are cleaned .  
 Person2:You really do a good job . 

informal