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 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. How may I assist you today? 
 customer: Can you please book me a flight ticket from LAS to PHL? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: Please help me with your name. 
 customer: I am Sarah Garcia. 
 agent: Please let me know with your planned travel dates. 
 customer: I want to start my journey on Sept 11th and return on Sept 13th. 
 agent: Do you need a direct or connecting flight? 
 customer: I am comfortable with both. 
 agent: Please let me know with your preferences in your journey. 
 customer: I want an economy class to travel. 
 agent: Do you have any other preferences in your journey? 
 customer: No. 
 agent: Please allow me a minute. 
 customer: Ok. 
 agent: We have a  connecting flight with two breaks operated by American Airlines with a fare of 100. Is it ok for you? 
 customer: Yes, please proceed. 
 agent: I have booked your ticket in economy class flight-1026. It departs at 0 AM and arrives at 12 PM. 
 customer: Thank you. 
 agent: Thank you for reaching us. Have a great time.

A: book
****
Q: customer: Hello. Donald Lopez here. 
 agent: Hello, how can I be in your service? 
 customer: I wan to attend a Seminar in Washington. Can you please help me for booking the flight ticket? 
 agent: Ok, I will be glad to assist you with that. May I know the airport codes to check? 
 customer: My airport codes are from LGA to DCA. 
 agent: Ok, please can you let me know your travel dates too? 
 customer: My travelling dates are from 09/15 to 09/17. 
 agent: Ok, please wait a moment. 
 customer: Make sure my connections limit is 1. 
 agent: Ok, I will check. 
 customer: Ok. 
 agent: Thank you for waiting, there is a flight with airfare 100 and the airlines is JetBlue. Can I book it? 
 customer: Please proceed for booking the flight ticket. 
 agent: Ok, the flight is been booked with 1 connecting flight limit as you needed. 
 customer: Thanks for helping me. 
 agent: Thank you for choosing our agency.

A:
book
****