In this task, you are given a conversation between a flight agent and the customer. You are given 4 options and you need to select the goal of the conversation. It is provided as part of customer's context, which has to be one of the following: `book`: Make a new reservation, `cancel`: Cancel an existing reservation, `no_flight`: No flight found for the customer's preference, `no_reservation`: No reservation / No change / No cancellation was made in the conversation, mostly enquiring details

Input: Consider Input: customer: Hi. 
 agent: Hello. How may I help you? 
 customer: I want to change my reservation due to health problem, can you help me? 
 agent: Yes, I am here to help you. Let me know your name please. 
 customer: Myself George Edwards. 
 agent: Edwards, please wait for a while. I will check your reservation status and get back to you. 
 customer: Ok. 
 agent: Edwards, I have not found any reservation by your name in our database. 
 customer: No problem, thanks for checking. 
 agent: You are most welcome and thank you for contacting us.

Output: no_reservation


Input: Consider Input: customer: Hi. 
 agent: Hello, how can I assist you? 
 customer: I need to cancel my reservation for a client meeting but I have got a sudden call from my friend that one of my friend got met with an accident so I feel to cancel my reservation. Can you please help me out? 
 agent: Sure, I am here to help you with that, can I know your good name to proceed further? 
 customer: Janet Perez here. 
 agent: Sorry, we found no reservation on your given name. 
 customer: That's ok, thank you for your help. 
 agent: Thank you for reaching us.

Output: no_reservation


Input: Consider Input: customer: Hello, I am Samuel Young. 
 agent: Hello, how may I help you? 
 customer: My kids were bored with daily schedule, so I want to make their mind fresh. I have decided to take a tour to Seattle. 
 agent: Do you need need to do flight booking? 
 customer: Yes, I need a flight between the Routes BOS and SEA. 
 agent: Ok, please share your dates of your journey. 
 customer: I would like to go on 12/09 and return back on 12/11. 
 agent: There is a flight available with 300 cost, shall I book? 
 customer: Ok, please proceed if it is a single connecting flight. 
 agent: Your ticket is booked with Hawaiian airlines and your flight number is 1014. 
 customer: Thank you. 
 agent: Thank you for reaching us.
Output: book