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:       Will you give your friends a buzz and put out a feeler to see if they like to offer me a loan ?  
 Person2:Give them a buzz ? What can I say to them ? Say that you want a loan ?  
 Person1:        I just want to make sure that there is possibility of giving us a loan .  
 Person2:And they , too , want to make sure their loan is worthwhile . 

formal