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:       Tell me about yourself and your past experience .  
 Person2:For the past 3 years , I have been working in China East Airlines Corporation Limited . I'm very tolerant of people and have been told that this is one of my strengths . I feel I have a lot to offer as a team member .  
 Person1:        Why are you interested in this occupation ?  
 Person2:It's always been my dream to be a stewardess . And I like travelling to different places .  
 Person1:        What do you think is the chief characteristic for a stewardess ?  
 Person2:Well , a stewardess should be friendly , courteous , patient and treat passengers kindly and politely .  
 Person1:        Do you get angry easily ?  
 Person2:No , I know how to control my temper .  
 Person1:        If a passenger had a accident , what would you do ?  
 Person2:I would give him or her basic first aid and ask my partner to call for assistance at the same time .  
 Person1:        If you are hired , when can you start work ?  
 Person2:I can begin to work right away because I am out of work now .  
 Person1:        What are your salary expectations ?  
 Person2:I really need more information about the job before we start to discuss salary . I'd like to postpone that discussion until later . Maybe you could tell me what is budgeted for the position and how your commission structure works . 

formal