Definition: 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
Input: customer: Hello. 
 agent: Hello, how may I aid you from my end? 
 customer: Myself Barbara Campbell, can you help me to book a flight from FL - MCO to EWR? 
 agent: Sure, I am here to help you out. Please provide me your travel dates. 
 customer: Ok, my travel date is 03/04 and return date is 03/06. 
 agent: Sorry  Barbara Campbell, there is no flight in your route. 
 customer: Thank you for the information, I will try next week to book.
Output:
no_flight