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:       When were you born may I ask ?  
 Person2:On 20th May 1963 .  
 Person1:        Do you know what it was according to the lunar calendar ?  
 Person2:27th day of the fourth month .  
 Person1:        By the way , could you tell me when the film will begin ?  
 Person2:It will begin at 5:30 .  
 Person1:        I am afraid I can't be there on time .  
 Person2:You can see it tomorrow .  
 Person1:        I don't want to miss it today . 

formal