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 can I help you today? 
 customer: My name is Matthew Harris, I want to book a flight from LAS to visit my home at Houston. Can you book a flight for me? 
 agent: Sure, we are gleeful to help you. Can you please share your trip dates? 
 customer: I will fly on Jan 5th and return on Jan 7th. 
 agent: May I know your destination airport code please? 
 customer: My destination point is IAH. 
 agent: Do you have any halt in between journey? 
 customer: Yes, I need a halt. 
 agent: Is there any other specifications? 
 customer: No. 
 agent: Thanks for providing details, we found a connecting flight with AA airline in business class and the flight number is 1008. Is it ok for you? 
 customer: Yes, please proceed with booking. 
 agent: Ok, your ticket is reserved with a fare of 100. 
 customer: Thank you for helping me. 
 agent: Thank you for choosing us.

Ex Output:
book


Ex Input:
customer: Hi. 
 agent: Hello,. How can I be at your service? 
 customer: I am Anthony Miller and help me to cancel the reservation, as my visa got rejected to go for a holidays vacation. 
 agent: Sure, we are here to assist you. 
 customer: Ok. 
 agent: Please be on hold for a second. 
 customer: Sure. 
 agent: Thanks for holding on, we found a reservation in your name and that has been cancelled successfully. 
 customer: Thank you. 
 agent: Thanks for approaching us, your amount will be credited to your account.

Ex Output:
cancel


Ex Input:
customer: Hello,. 
 agent: Hello, How can I assist you today? 
 customer: I am Katherine Clark. 
 agent: Ok. 
 customer: I want to adopt a boy who is living in Orphanage home at Houston. Can you please book a ticket which is having one connection? 
 agent: Sure, I am glad to help you. 
 customer: Thank you. 
 agent: May I know from where would you like to start and end your journey? 
 customer:  I need to leave from my nearest airport AUS to reach IAH. 
 agent: Please share the travelling dates. 
 customer: I want to travel on 01/12, and need to catch return flight on 01/14. 
 agent: Ok, do you have any other specifications? 
 customer: Make sure to check a flight with in a price limit of 5000. 
 agent: Ok. Based on your request we found a JetBlue plane provided with a connecting flight. Can I proceed to book with flight number 1016? 
 customer: Proceed with the booking. 
 agent: Your ticket has been reserved. 
 customer: Thanks for the help. 
 agent: Thank you.

Ex Output:
book