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:       Would you please make a skirt for me with this material please ?  
 Person2:What kind of style do you want ?  
 Person1:        I like miniskirt .  
 Person2:Now let me take your measurements .  
 Person1:        When can I get it ?  
 Person2:Three days later .  
 Person1:        Thank you , see you then .  
 Person2:Bye-bye . 

informal