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. Amy Jones here. 
 agent: Hello, how can I support you? 
 customer: Can you book a flight ticket for my airport codes that is from SFO to PHX? 
 agent: May I know your trip dates? 
 customer: The trip dates are from 18 June to 20 June. 
 agent: Do you need any break in my journey? 
 customer: Yes. 
 agent: Is there any class preference? 
 customer: No. 
 agent: Do you have any other requirements? 
 customer: No, that is it. 
 agent: May I know your name please? 
 customer: I am Amy Jones. 
 agent: There is a connecting flight with fare of 100 and 1020 flight number. Shall I proceed? 
 customer: You can book the flight ticket. 
 agent: Your seat has been reserved with Frontier airlines in economy class. 
 customer: Thank you. 
 agent: Thank you for choosing our services.

A: book
****
Q: customer: Hello,. 
 agent: Hello. How may I guide you today? 
 customer: Can you please help me in cancelling my recent reservation, as my FIFA match got cancelled. 
 agent: Sure, I am gleeful to help you with that. May I know your name please? 
 customer: Myself, Lisa Mitchell. 
 agent: Please wait for a while, let me check your previous reservation status. 
 customer: Ok. 
 agent: Thank you for waiting. There is no reservation found on your name in our database to cancel it. 
 customer: Ok, no issues. Thank you for opting us. 
 agent: Thank you for reaching us, have a great day.

A: no_reservation
****
Q: customer: Hello. 
 agent: Hello, how may I aid you today? 
 customer: Can you please check for the flights on the route from BOS to DEN? 
 agent: Sure, can you please provide your departure and arrival dates? 
 customer: My journey dates are from Oct 20 to Oct 22. 
 agent: Are you looking for any preferred class? 
 customer: Any class will be ok but my depart time will be in afternoon. 
 agent: Do you have any other specifications to be met? 
 customer: I need 1 connection flight. 
 agent: Kindly mention your name? 
 customer: Myself Mark Phillips. 
 agent: We have found a connected flight of United airlines, flight number-1018 class-economy depart time-afternoon 15:00 PM and fare is 200. 
 customer: Please book it. 
 agent: Sure, your ticket has been booked. 
 customer: Thank you for helping me.

A:
book
****