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 like to travel ?  
 Person2:Oh , yes . I often went on business trips in the past six years .  
 Person1:        How many languages can you speak in addition to your mother tongue ?  
 Person2:I speak English and French in addition to my mother tongue , Chinese .  
 Person1:        That's fine . What salary do you get at your present position ?  
 Person2:My present monthly salary is $ 1,500 .  
 Person1:        We'll start you off with a base salary of $ 20,000 a year , with bonuses that can add up to $ 40,000 . A company car , and a company pension scheme . Is that acceptable to you ?  
 Person2:I think so .  
 Person1:        Excellent . Well , thank you very much , Mr . B , and you'll be hearing from us in the next few days , either way .  
 Person2:Thank you . Mr . A , and I certainly hope the answer will be favorable . Goodbye . 

formal