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: Hi. 
 agent: Hello. How can I help you? 
 customer: Please help me to book a flight ticket from SFO to visit Central Hall in EWR. 
 agent: Let me know your journey dates? 
 customer: Sure, I intend to start on 09/04 and my return date will be on 09/06. 
 agent: Do you have any preference? 
 customer: I prefer to fly with the connecting flight. 
 agent: Can I know your name? 
 customer: I am Jerry Williams. 
 agent: Found ticket with JetBlue airlines for price 100 having flight number 1029. 
 customer: That's fine, you can book the ticket. 
 agent: Ticket is booked. 
 customer: Thank you for your assistance in booking. 
 agent: Thank you.
A:
book