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. How can I hand helping to you? 
 customer: I am Jeffrey Collins want to attend a workshop at Denver, can you book a ticket from OAK to DEN? 
 agent: Sure, can you please provide me the dates of your trip? 
 customer: Sure, my travelling dates will be 09/21 and 09/23. 
 agent: I found a 1 lay by in your journey in AA airlines, can I proceed with booking? 
 customer: Yes, proceed with my booking. 
 agent: Ok, the ticket booking is done in 1008 flight number. 
 customer: Thank you. 
 agent: Most welcome.
A:
book