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, how can I aid you? 
 customer: I have planned to visit DFW from JFK, please assist me in booking. 
 agent: Sure, can you share your trip dates? 
 customer: My preferred dates are Mar 10th and return Mar 12th. 
 agent: Do you have any preferences? 
 customer: Yes, I need economy class. 
 agent: May I know your name? 
 customer: Barbara Martinez. 
 agent: There is a connecting flight with number 1002 in airline Spirit, the fare is 100 in economy class. Can I book it? 
 customer: Proceed. 
 agent: Your ticket is reserved, the depart time is 23:00 hours and return time is 13:00 hours. 
 customer: Thank you for booking. 
 agent: Thank you for opting us.

A: book
****
Q: customer: Hello. 
 agent: Hello, how may I aid you? 
 customer: I am Eric Baker want to present my documentation in National Conference at NY-EWR. Can you book a ticket from TX-HOU? 
 agent: Sure, we are perky to serve you. May I know your trip dates? 
 customer: My trip dates are 02/10 and 02/12. 
 agent: Sorry to inform you that, no flights are available based on your requirements. 
 customer: Ok, no issues. Thank you for your help. 
 agent: Thank you for choosing us.

A: no_flight
****
Q: customer: Hi. 
 agent: Hello. 
 customer: I'm Edward Thompson. 
 agent: How may I help you today? 
 customer: I'm planning to go DCA, can you help me in ticket booking from LGA? 
 agent: I am happy help you with that. 
 customer: My departure and return dates are 03/11 and 03/13. 
 agent: Please give me a minute, I will get back with your details. 
 customer: Sure. 
 agent: I found a ticket for you with price 100, flight number is 1011 and connection is 1. Is it ok for you? 
 customer: Yes, please go for booking. 
 agent: I confirmed your ticket successfully with Spirit airline. 
 customer: Thank you so much for booking. 
 agent: Thank you for reaching us, have a great day?

A:
book
****