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

Input: Consider Input: customer: Hi. I am Daniel Moore. 
 agent: Hello, how can I help you? 
 customer: I want to attend a political meeting at Charlotte. Can you help me in my reservation? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: Please provide me your travelling dates? 
 customer: I Will start my journey on 06/14. I will return back on 06/16. 
 agent: Kindly mention me your airport codes? 
 customer: My source airport code is New York, NY - JFK. My destination airport code is Charlotte, NC - CLT. 
 agent: Do you have any specifications? 
 customer: I need a layover in my journey. I can pay up to 1000. 
 agent: Please wait a minute. 
 customer: Sure. 
 agent: Thanks for waiting, sorry to inform you that there are no flights with your specifications. 
 customer: Not an issue. Thank you for your kind information. 
 agent: Thank you for reaching us.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: I am planning to for a heritage tour in PHX. Can you book me a ticket from AUS? 
 agent: Sure, can you share me your travelling dates? 
 customer: I will be leaving on Oct 25 and will come back on Oct 27. 
 agent: Do you have any connection limit? 
 customer: I need 1 stop over within my route. 
 agent: Is there any other specifications? 
 customer: No. 
 agent: May I know name please. 
 customer: I am Kevin Phillips. 
 agent: I found a flight with the price of 100 having one connection and economy class. Can I proceed to booking? 
 customer: Fine, please proceed. 
 agent: Your ticket is booked with the flight- 1008. 
 customer: Thanks for your support. 
 agent: Thank you for reaching us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, do you need any help from us? 
 customer: Can you please make a reservation from PHX to EWR to attend a conference in New York? 
 agent: Sure, could you please share your departure and arrival day? 
 customer: My depart and arrival dates are, Aug 6th and 8th. 
 agent: Ok, could I have your name please? 
 customer: My name is Carolyn Martinez. 
 agent: Ok, do you need direct or connecting flight? 
 customer: I need a connecting flight. 
 agent: Ok, do you have any other specifications? 
 customer: No. 
 agent: The economy class with flight number 1028 of American Airline is available having fare as 100 and connection as 1, is it ok for you? 
 customer: Ok, proceed with this airlines. 
 agent: Ok, your reservation is confirmed. The departure time is 14:00 hours and the arrival time is 0:00 hours. 
 customer: Thank you for your help. 
 agent: You are welcome, have a great day.
Output: book