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

Ex Input:
customer: Hi. 
 agent: Hello. How may I assist you? 
 customer: I am looking for a direct flight from JFK to DTW, can you please help me to book my flight ticket? 
 agent: Sure, I am here to help you out. May I know your travelling dates please? 
 customer: Sure, I will depart on Jan 5th and I want to return back on Jan 7th. 
 agent: How much you can afford for airfare? 
 customer: I can only afford 500. 
 agent: Wait a moment please. 
 customer: Sure. 
 agent: May I know your name pleas to proceed further? 
 customer: Sure, my name is Catherine Mitchell. 
 agent: Catherine Mitchell, there are no flights available in you route. 
 customer: Not an issue, I will find an other way to reach my destination. Anyway, thank you. 
 agent: Thank you for choosing us.

Ex Output:
no_flight


Ex Input:
customer: Hello. 
 agent: Hello, how may I assist you today? 
 customer: I want to travel from OAK to SEA. Can you help me to book a flight ticket? 
 agent: Sure, may I know your travelling dates? 
 customer: I want to fly in the flight on Sept 29 and Oct 01. 
 agent: Do you need any specification? 
 customer: I want to travel in a connecting flight. 
 agent: Please wait a moment. 
 customer: Ok, take your time. 
 agent: There is a flight with one connection and the price is 200 in Southwest Airlines, can I proceed with the reservation? 
 customer: Proceed to booking. 
 agent: Your ticket has been reserved with the flight number 1026. 
 customer: Thank you for your help. 
 agent: May I know your name? 
 customer: Janet Clark. 
 agent: Thank you for reaching our service.

Ex Output:
book


Ex Input:
customer: Hi. I am Shirley Robinson. 
 agent: Hello, how can I help you now? 
 customer: I need to book a flight ticket from LAS to IAD, Can you please help me for booking? 
 agent: Sure, please share me your planned journey dates? 
 customer: I would like to travel on 07/21 to return on 07/23. 
 agent: May I know your connection limit? 
 customer: I need a connecting flight. 
 agent: Please share me your depart and return flight timing? 
 customer: I would be return on morning. 
 agent: Do you have any other requirement related to booking? 
 customer: No. 
 agent: Thank you for the details, I found a connecting flight 1026 of airline Southwest, fare is 200 and class is economy. Shall I proceed with booking? 
 customer: Ok, proceed for booking. 
 agent: Your flight ticket has been booked. 
 customer: Thanks for your information. 
 agent: Thank you for reaching us, have a nice journey.

Ex Output:
book