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: Hello. 
 agent: Hello. 
 customer: I am Karen Walker. 
 agent: How can I assist you? 
 customer: I want to book a ticket from PHL to JFK to attend seminar, can you help me in booking? 
 agent: Sure, please provide me your journey dates. 
 customer: I am departing on 03/17 and return on 03/19. 
 agent: Please wait for a minute. 
 customer: Sure. 
 agent: I found a flight in Southwest airlines with price 200. Shall I book the ticket for you? 
 customer: Please proceed for booking. 
 agent: Your ticket is confirmed and the flight number is 1018. 
 customer: Thank you. 
 agent: Thank you for contacting us.

A: book
****
Q: customer: Hi. 
 agent: Hello. 
 customer: I am Thomas Edwards. 
 agent: How can I assist you? 
 customer: Can you help me to cancel my reservation? 
 agent: Ok, I am here to help you. Can you please wait for a while. 
 customer: Sure, please check my reservation details. 
 agent: Sorry, no reservation found on your name to cancel. 
 customer: Oh! ok, no issues. Thank you for your time. 
 agent: Thank you for reaching us.

A: no_reservation
****
Q: customer: Hi. I am Laura Walker. 
 agent: Hello, how can I aid you today? 
 customer: As I keep travelling due to the nature of my work, this time I have to travel to MCO. Please help me to book a flight from PHL. 
 agent: Sure, when are you planning to start and return on? 
 customer: I am planning to start my journey on Nov 10th and return on Nov 12th. 
 agent: Do you need a connecting flight? 
 customer: Yes, I need a connecting flight. 
 agent: What are your departure and return timings? 
 customer: The return time should be afternoon. 
 agent: In which class do you want to fly? 
 customer: I am comfortable with any class. 
 agent: Thank you for your details, we found a connecting flight 1021 in economy class with American Airline. Shall I proceed with afternoon flight while returning? 
 customer: Please proceed. 
 agent: Your ticket has been confirmed. 
 customer: Thank you. 
 agent: Thank you.

A:
book
****