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 can I assist you? 
 customer: I would like to meet my client at Washington-DC, can you please book my flight ticket from IAH to IAD? 
 agent: Can you provide me your dates of journey to book a ticket? 
 customer: Thank you. I will depart on Sept 14th and return back on Sept 16th. 
 agent: Ok, please can I know your specifications? 
 customer: I only prefer for a flight having single connection. 
 agent: May I know your name too to book a ticket? 
 customer: My name is Anthony Edwards. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: There is a connecting flight available for the airfare 100 and the class is economy provided by American Airlines. 
 customer: Happy to hear that, you can book the ticket for me. 
 agent: The flight ticket is confirmed and the flight number is 1009. 
 customer: Thank you so much. 
 agent: Thank you for connecting with our agency.
Output:
book