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: Hello. 
 agent: Hello, how can I help you? 
 customer: Andrew Green here. 
 agent: Nice to meet you. 
 customer: I want to make a reservation for my journey from LAX to meet my wife in EWR, can you please assist me with booking? 
 agent: Sure, I will help you with that. Could you please share your planned travel dates? 
 customer: I will takeoff for my journey on 07/02 and I will be returning on 07/04. 
 agent: Ok, please be on hold. 
 customer: Ok, please check for the flights within the price of 500 only. 
 agent: Sure. 
 customer: Thank you. 
 agent: Thank you for waiting, there are flights found in Jet Blue airline with connection 1 and with price 200. Shall I proceed with booking? 
 customer: That's great to hear form you, you can reserve my ticket for this journey. 
 agent: Kenneth, your booking has been done with flight 1011. 
 customer: Thank you for helping me out with my booking. 
 agent: Thank you for reaching us, have a safe journey. 
 customer: Most welcome.
Solution:
book