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:       May I have the menu , please ? 
 Person2:Oh . I am sorry , here you are . May I suggest our lunch special ? 
 Person1:        Could I have a few more minutes ? 
 Person2:Of course . I will be here minutes later . 

informal