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: Hi,. 
 agent: Hello, how can I aid you today? 
 customer: I am Andrew Hill. I want to know about ticket availability to DEN from PHX. Will you please give the information? 
 agent: Sure, we are here to help you. Can you please provide your journey dates? 
 customer: Yeah. My journey dates are 12/26 and 12/28. 
 agent: Ok, please wait a moment. I will check the availability. 
 customer: OK. 
 agent: Thanks for your time. There is a flight with airline JetBlue and airline number is 1026. Fare of ticket is 200 with one connection. Shall I proceed with this booking? 
 customer: You can proceed. 
 agent: Your ticket has been reserved. Thank you for connecting wit us. Have a safe journey.
A:
book