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: Hi,. 
 agent: Hello, how may I assist you? 
 customer: My name is Anthony Lewis. I need a ticket from Washington DC-IAD to New York, NY-LGA, for an autoshow. 
 agent: Could you please provide me your travel dates? 
 customer: Travelling dates are from 03/20 to 03/22. 
 agent: Do you have any specifications? 
 customer: Price limit is 1000. Connections limit is 1. 
 agent: Thanks for giving your details, we found a flight on your details with airline JetBlue, flight number: 1027. 
 customer: Please book ticket. 
 agent: Your ticket has been booked. 
 customer: Thanks. 
 agent: Thanks for choosing us.
Output:
book