You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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

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.
Solution: no_reservation
Why? 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

New input: customer: Hi, I am Jacob Turner. 
 agent: Hello, how can I help? 
 customer: I would like to visit magic kingdom park in Orlando on 06/01. Can you make a reservation from MSP? 
 agent: Sure, may I know if you have any special request for this journey? 
 customer: I need a layby. My price is 500. 
 agent: Sure, can you please provide your source airport code? 
 customer: Sure, my landing point is MCO. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: May I know your return date? 
 customer: Sure, I need to return on 06/03. 
 agent: We have a Frontier airline flight with number 1004 and the price is 100. Shall I proceed? 
 customer: Yes, you can. 
 agent: Your ticket is booked. 
 customer: Thank you for your assistance. 
 agent: Thank you.
Solution:
book