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, I am Kimberly Nelson. 
 agent: Hello, how can I render you today? 
 customer: I have to attend a Autoshow exhibition with my granddad. 
 agent: Ok. 
 customer: Can you make a reservation with a single connection? 
 agent: Sure, we are perky to help you. Can you please provide your take off and landing airport codes? 
 customer: Sure, I need to depart from LAS to IAD. 
 agent: On which dates would you like me to book a flight ticket for you? 
 customer: Sure, my journey dates are 01/10 and 01/12. 
 agent: May I know how much do you want to spend on flight ticket? 
 customer: I can bare upto 5000. 
 agent: Ok, please wait a moment, let me search a flight for you. 
 customer: Sure. 
 agent: Thanks for your precious time. We found Delta airline fare of 100. Shall I proceed for booking with single stopover flight? 
 customer: Go ahead. 
 agent: Your ticket has been confirmed with airline number 1002. 
 customer: Thank you for your help. 
 agent: Thank you for opting us.
A:
book