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 Rebecca Nelson. 
 agent: Nelson, how may I assist you? 
 customer: I am looking for a direct flight, could you please help me with that? 
 agent: Sure, may I know your itinerary dates? 
 customer: I would like to take off on 11/29 and return on 12/01. 
 agent: Please share your origin and destination airport codes. 
 customer: My nearest source airport code is JFK and destination airport code is PHX. 
 agent: Please give me a moment to check for a best flight. 
 customer: Sure, take your time. 
 agent: Frontier airlines with flight 1004 having 1 connection is providing service on your route. 
 customer: I am looking for a direct flight. 
 agent: Let me check. Sorry, no direct flight is available. 
 customer: That's ok, not an issue. 
 agent: Thank you for contacting us. 
 customer: Anyways, thank you for the information.

A: no_flight
****
Q: customer: Hello. . 
 agent: Hello, how can I help you? 
 customer: I want to attend mechanical workshop, can you please book the ticket from DCA to LAX? 
 agent: Sure, we are perky to assist you. Can you please let me know your travelling dates? 
 customer: Sure, my planned departure and return travel dates are 1st and 3rd of July. 
 agent: Is there any connection limit for you? 
 customer: I don't have any specifications, I'm ok with any flight. 
 agent: May I know your good name? 
 customer: My name is Jeffrey Martin. 
 agent: Sorry, we are unable to provide flights on your journey routes. 
 customer: Oh! That's ok, thank you for giving the information anyways. 
 agent: Thank you for contacting us.

A: no_flight
****
Q: customer: Hi. 
 agent: Hello. 
 customer: I am John Scott. 
 agent: How can I be your helping hand? 
 customer: I would like to book a flight ticket to Atlanta, GA -ATL on 09/03. 
 agent: Ok. 
 customer: Sorry, book on 10/03. 
 agent: May I have your travelling details? 
 customer: Dallas& Fort Worth, TX - DFW is my source. And I should return on 10/05. 
 agent: Do you have any specifications? 
 customer: Yes, 5000 is my price limit. 
 agent: Thanks for waiting. You have 1012 flight with 1 connection of price 300 in Delta airline. Shall I reserve your ticket? 
 customer: Ok,proceed. 
 agent: Your ticket was booked. 
 customer: Thank yopu. 
 agent: Thank you for your time with us.

A:
book
****