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. 
 customer: My name is Michelle Allen. 
 agent: How may I help you today? 
 customer: Owing to an emergency, I want to cancel my recent reservation. Can you help me in cancel reservation? 
 agent: Sure, please wait for a moment. 
 customer: Sure. 
 agent: Sorry, there is no reservation found basis on your details. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for reaching us.

Ex Output:
no_reservation


Ex Input:
customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I am Stephen Moore. Can you please help me in cancelling my recent reservation? 
 agent: Sure, ok. I am sorry no reservation found on your name. 
 customer: Ok, thank you for checking. 
 agent: Thank you.

Ex Output:
no_reservation


Ex Input:
customer: Hello, I am Benjamin Smith. 
 agent: Hello Smith, how can I help you for today? 
 customer: I want to book a ticket from ATL to EWR. 
 agent: OK, could you mention your travel dates? 
 customer: My travelling dates will be from 08/25 and 08/27. 
 agent: OK, there is a flight 1005 in airline Spirit having connection 1 and price is 100. Shall I proceed with your booking? 
 customer: Sure, proceed my booking. 
 agent: OK, your booking is done. Have a great journey!. 
 customer: Thank you.

Ex Output:
book