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? 
 customer: I have to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. Can you please help me out in changing my reservation? 
 agent: Sure, I am here to help you. May I know your name? 
 customer: Thank you and myself Brian Wilson. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Thank you for your time, There was no reservation found on your name in our database. 
 customer: It's ok, thank you for your help. 
 agent: Thank you for choosing us.

Ex Output:
no_reservation


Ex Input:
customer: Hi, I am Timothy Campbell. 
 agent: Hello, what can I do for you today? 
 customer: I am planning to travel to New York to celebrate my cousin birthday. Can you make a reservation with a single connection? 
 agent: Sure, could you please share your travelling dates? 
 customer: Sure, I need to fly on 06/09 and 06/11. 
 agent: Ok, may I know your near by airport codes? 
 customer: Sure, I need to deviate from Austin AUS. 
 agent: Kindly mention your destination airport code? 
 customer: Sure, my landing point is LGA. 
 agent: There are no flights found on your requested dates. 
 customer: Ok, not an issue. 
 agent: Thank you for reaching us. 
 customer: Thank you for your information.

Ex Output:
no_flight


Ex Input:
customer: Hi. 
 agent: Hello, how may I aid you today? 
 customer:  I want to cancel my reservation as my project got ramp down. Can you help me with that? 
 agent: Sure, I am here to help you with this. May I know your good name please? 
 customer: Thank you. I am Paul Hernandez. 
 agent: Please wait for a moment. 
 customer: Sure. 
 agent: Sorry Paul, there is no active reservation found on your name to cancel it in your database. 
 customer: Ok, no issues. Thanks for the information. 
 agent: You are welcome.

Ex Output:
no_reservation