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. 
 agent: Hello. How can I help you? 
 customer: I would like to change my existing reservation as my plan to go for a holiday trip got postponed. Can you please help me with this? 
 agent: Sure, may I know your name please? 
 customer: My name is Anthony Phillips. 
 agent: Please wait a moment. 
 customer: Sure. 
 agent: Unfortunately there is no reservation found with your given name. 
 customer: Not a problem, thank you for checking. 
 agent: Thank you for choosing us.
Example output: no_reservation
Example explanation: Here the customer has not asked for any booking, he just wanted to update his already booked flight, so the status would be no_reservation
Q: 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.
A:
book