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:       Excuse me , is there a table for 8 right now ?  
 Person2:Let me see ... I am sorry the tables you want are booked .  
 Person1:        Well , since there are some small square tables , could we put two tables together ?  
 Person2:No problem , sir . Let me help you . 

informal