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 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.
Example Output: no_flight

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: Hello. 
 agent: Hello, How can I assist you? 
 customer: I am Pamela Martinez. 
 agent: May I know your travelling details? 
 customer: Actually I need to cancel my reservation. Can you please help me? 
 agent: Sure, Please wait a minute. 
 customer: OK. 
 agent: Sorry, No reservation found on your name. Thank you for choosing us. 
 customer: Its k cool. Thank you.
Example Output:
no_reservation