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
One example is below.
Q: 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.
A: no_reservation
Rationale: 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. 
 agent: Hello. How may I assist you at this moment? 
 customer: Can you please help me in reserving my flight from PHL to reach EWR, as I have a business meeting there? 
 agent: Sure, I am here to help you out. Can you please share your travel dates? 
 customer: Thank you, my travelling dates are Feb 10th and Feb 12th. 
 agent: May I know your connection limit? 
 customer: I prefer a connecting flight for my journey. 
 agent: Do you have any other requirements? 
 customer: I don't have any other requirements. 
 agent: Ok, please let me know your name to proceed further. 
 customer: Barbara White is my name. 
 agent: There is a flight available with price 100 and the connection is 1 from Southwest Airlines. Would you like me to proceed with the booking? 
 customer: I am comfortable with the given flight details. You can proceed by booking. 
 agent: Your ticket has been confirmed with the flight-1003 in economy class. 
 customer: Thank you for the great service. 
 agent: Welcome, have a safe trip.
A:
book