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: Hello,. 
 agent: Hello, How can I support you today? 
 customer: Please book a ticket to New York, on the name of Janet Davis. As I want to participate in the Bateaux New York Dinner cruise, with my brother. 
 agent: Sure, I will help you with that. Let me know your source point and return date? 
 customer: Source is GA - ATL, Atlanta. I will return on 09/20. 
 agent: Can you share me destination point please? 
 customer: NY - EWR, New York. 
 agent: Can you provide me your departure date for booking? 
 customer: On 09/18, I will start. 
 agent:  Please, stay online I will check the availability and revert to you. 
 customer: Sure, take your time. 
 agent:  Thanks for your precious time. We found Southwest airline fare of 100. Shall I proceed for booking with single stop over flight? 
 customer: It is very comfortable for me, please hold me a seat. 
 agent:  Your ticket has been confirmed with airline number 1019. 
 customer: Thank you for your effort and support. 
 agent: Thank you for opting us. Have a safe journey!.
A:
book