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: Hello. 
 agent: Hello. 
 customer: Gregory Jackson here. 
 agent: How may I assist you today? 
 customer: I want to travel from Washington to New York for attending a Seminar. Can you please help me for booking the flight ticket? 
 agent: Sure, I am here to help you with that. Can I know your travelling dates? 
 customer: My travelling dates are from 01/28 to 01/30. 
 agent: Please wait for a minute. 
 customer: Ok. 
 agent: Ok, may I know your airport codes? 
 customer: My airport codes are from DCA to JFK. 
 agent: Wait for a minute. 
 customer: Ok, I will wait. 
 agent: The Southwest airlines having a connection limit 1. Can I proceed with the booking? 
 customer: Please proceed for booking the flight ticket. 
 agent: Yes, your ticket is reserved with the flight number 1013. 
 customer: Thanks for helping me. 
 agent: Thank you for reaching us. Have a safe journey.
A:
book