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

Q: 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.

A: no_flight
****
Q: customer: Hello. 
 agent: Hello! tell me how may I help you? 
 customer: Can you help me to change my existing reservation? 
 agent: OK, can you please tell me your name ? 
 customer: Yes, my name is William Thompson. 
 agent: Sorry, William  no reservation found on your name. 
 customer: Ok, thank you. 
 agent: Thank you.

A: no_reservation
****
Q: customer: Hello. 
 agent: Hello, how can I assist you? 
 customer: I am planning to book a flight ticket to DCA from OAK, can you please help me out? 
 agent: Sure, I can help you with that. May I know your travel dates please? 
 customer: Sure, my planned travelling dates are May 24 and May 26. 
 agent: May I know how many connections are you expecting in between your journey? 
 customer: Sure, I am looking for a flight with 1 connection. 
 agent: Please let me know if you have any other specifications. 
 customer: That's all for now. 
 agent: Can I have your good name please? 
 customer: Sure, my name is Jason Young. 
 agent: JetBlue airlines is providing a flight on that route with ticket fare of 100 and single connection, it will departs at 12:00 hours and arrives at 5:00 hours. Shall I proceed for booking? 
 customer: Ok, please confirm my reservation. 
 agent: I have successfully booked you an economy class ticket in flight-1014, have a safe journey. 
 customer: Thank you for the help. 
 agent: Thank you for choosing us.

A:
book
****