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 input: 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 output: 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
Q: customer: Hi. 
 agent: Hello. 
 customer: Jason Adams here. 
 agent: How can I assist you today? 
 customer: I have to attend a Live Concert at Atlanta, could you please help me with booking a flight ticket from AUS to ATL? 
 agent: Sure, can you please share your travel dates? 
 customer: Ok, my preferred travel dates are from 07/10 to 07/12. 
 agent: Let me check for the availability of flight. Jason, there is a flight available with price 100 and the connection is 1 with AA airline. Would you like me to proceed with the booking? 
 customer: Ok, please proceed for booking. 
 agent: Your booking is confirmed with 1019 flight number. 
 customer: Thank you so much. 
 agent: Thank you for reaching us, have a great day.
A:
book