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

Example Input: customer: Hi, I am John Nelson. 
 agent: Hello, what kind of assistance you are looking for? 
 customer: Can you please help me with booking a flight ticket from LAX to IAD? 
 agent: Sure, I am ecstatic to help you. 
 customer: Thank you. 
 agent: Let me know, how much you can afford for this journey? 
 customer: I can afford up to 5000. 
 agent: Do you have any class preference? 
 customer: I prefer business class. 
 agent: Kindly, share your travelling dates to proceed further. 
 customer: Travel dates are 12/06 and 12/08. 
 agent: Thank you for sharing your details. Please, hold on for a while. 
 customer: Ok. 
 agent: Thank you for waiting, there are no flights available with your requirements. 
 customer: Ok, no issues. Thanks for the help. 
 agent: Thank you for approaching us.
Example Output: no_flight

Example Input: customer: Hello. 
 agent: Hello, how may I assist at this moment? 
 customer: I have to cancel my recent reservation, can you please help me out? 
 agent: Sure, please give me a while. 
 customer: Shirley Miller is my name, please search my flight ticket on that name. 
 agent: Can I know your good name? Ok Miller, there is no reservation showing on your name. 
 customer: Ok, not an issue. Thank you for your information. 
 agent: Thank you for opting us.
Example Output: cancel

Example Input: customer: Hello, I am Deborah Adams. 
 agent: Hello, how may I assist you? 
 customer: Can you make a reservation from ORD to DCA for me? 
 agent: Sure, may I know your planned travel dates please? 
 customer: I am planning to start on 10/22 and return back on 10/24. 
 agent: There is a flight available on your requested dates from Hawaiian airlines with 1 connecting flight.Shall I confirm your booking? 
 customer: Yes, you can go ahead. 
 agent: Your ticket is booked with flight 1000. 
 customer: Thank you for the support. 
 agent: You are welcome.
Example Output:
book