Instructions: 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, I am Samantha  Wright. 
 agent: Hello, how may I oblige you today? 
 customer: I need to attend the birthday party at Denver for enjoying with my childhood friends. Could you please help me in booking a ticket from SEA and DEN? 
 agent: Sure, can you please mention your journey dates? 
 customer: My travelling dates are 11/25 and return on 11/27. 
 agent: Ok, do you have any other specifications? 
 customer: Price should be below 1000. 
 agent: Ok, please wait a while. 
 customer: Sure. 
 agent: Thank you for waiting, there is a flight in JetBlue airline with a halt in between your journey. 
 customer: You can proceed. 
 agent: The flight number is 1006 and the price is 200. Your booking has done. 
 customer: Thank you for your quick response. 
 agent: Thank you for choosing us.
Output:
book