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: 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: Hello. 
 agent: Hello. How may I assist you now? 
 customer: I would like to meet my friend on his birthday at Oakland, please help me in booking a ticket from SEA to OAK. 
 agent: Sure, I will help you with that. Can you please provide your preferable dates of travelling? 
 customer: I would like to plan my journey on Jan 4 and return on Jan 6. 
 agent: On whose name I have to book the flight ticket? 
 customer: My name is Anthony Johnson. 
 agent: Do you have any connection limit? 
 customer: I need a connecting flight for my trip. 
 agent: Any more specifications do you have? 
 customer: I prefer normal-cost airlines. 
 agent: Please wait a moment to check the flights. 
 customer: Sure, take your time. 
 agent: Unfortunately there are no flights running on your route with your required preferences. 
 customer: Ok, no problem. Thank you for your information. 
 agent: Thank you for approaching us, have a great day.

Ex Output:
no_flight


Ex Input:
customer: Hello,. 
 agent: Hello, how may I help you? 
 customer: Please book a ticket from Orlando, FL-MCO to Philadelphia, PA-PHL. 
 agent: Sure, do you need any stopover in between your journey? 
 customer: Connections limit is 1. 
 agent: Kindly share your travelling dates. 
 customer: Travelling dates are from 10/22 to 10/24. 
 agent: Let me know your good name. 
 customer: I am Pamela Davis. 
 agent: Unfortunately, there is no flight found matching with your requirements. 
 customer: Thanks. 
 agent: Thanks for availing us.

Ex Output:
no_flight