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

Example Input: customer: Hi, I am Mark Jones. 
 agent: Hello, how can I help you? 
 customer: Owing to an emergency, my boxing championship has been postponed. So I have a request to you to change my existing reservation? 
 agent: Sure, wait for some time. 
 customer: Sure. 
 agent: Thanks for waiting there is no reservations found on your name. 
 customer: Ok, no issues at all. Thanks for your assistance. 
 agent: Thanks for choosing us.
Example Output: no_reservation

Example Input: customer: Hello. 
 agent: Hello, how may I help you? 
 customer: I am Mary Walker. I want to visit Titanic the aircraft exhibition at MCO, can you please book a ticket for me? 
 agent: Sure, we are here to help you. May I know your planned dates of travelling? 
 customer: My trip dates are 10/29 to 10/31. 
 agent: May I Know your boarding point? 
 customer: Source: PHX. 
 agent: Thank you for the details. Please be on hold. 
 customer: Sure. 
 agent: I found a flight with number 1024 and Delta airline. Shall I proceed? 
 customer: You can proceed. 
 agent: Your flight ticket has been booked with single connection and fare of 200. 
 customer: Thank you. 
 agent: Thank you for reaching us.
Example Output: book

Example Input: customer: Hi. 
 agent: Hello, how can I guide you today? 
 customer: Can you please help me in reserving a ticket to reach Houston with fare 1000? 
 agent: Sure, I am glad to help you. 
 customer: Thank you. 
 agent: Help me with your airport codes please? 
 customer: My airport codes are from LAS to IAH. 
 agent: On which dates you want me to book a flight ticket for you? 
 customer: Please book a ticket on 01/22 and need to return on 01/24. 
 agent: Thanks for your details, we found a connecting flight with flight number 1019 in Hawaiian airline and fare is of 100. Shall I reserve it? 
 customer: You can reserve it. 
 agent: May I know your good name please? 
 customer: I am Stephen Davis. 
 agent: Your ticket has been confirmed. 
 customer: Thank you for your extendable support. 
 agent: Thank you for choosing us.
Example Output:
book