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: 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 solution: 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

Problem: customer: Hello, I am Janet Harris. 
 agent: Hello, how can I assist you? 
 customer: I am planning to celebrate Christmas Day with my family in Minneapolis, can you please help me to book a flight ticket? Make sure that my price limit is 5000. 
 agent: Sure, may I  know your journey dates to check the availability of flights. 
 customer: And I need a flight with single connection. My journey dates are from 12/24 to 12/26. 
 agent: Please provide your airport codes. 
 customer: I am travelling from DTW to MSP. 
 agent: We found a flight with Hawaiian airlines and price is 100 with single connection of 1021 flight. Shall I proceed for booking? 
 customer: Ok, you can proceed with my booking. 
 agent: Your ticket has been confirmed. 
 customer: Thanks for your service. 
 agent: Thanks for choosing us. 
 customer: Thank you.

Solution: book