Detailed 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
Problem:customer: Hi. 
 agent: Hello. 
 customer: I am Matthew Green. 
 agent: How can I help you now? 
 customer: Please search flights on these routes LAX to JFK? 
 agent: Sure, can you please mention the travelling dates of your journey? 
 customer: I am going to start my journey on 05/01 and I would like to return on 05/03. 
 agent: Ok, please wait for a while. 
 customer: OK. 
 agent: Thank you for waiting, there is a flight 1001 in Delta airline has the price 100 with 1 connection. Can I proceed with this booking? 
 customer: Ok proceed to booking. 
 agent: Your booking is done, have a safe journey. 
 customer: Thank you for booking. 
 agent: Thank you for approaching us, have a nice day.
Solution:
book