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

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
****
Q: customer: Hi. I am Jessica Evens. 
 agent: Hello,. How may I serve you? 
 customer: I want to book a flight ticket on  01/04 to 01/06 for which I have a exam at IAH. 
 agent: Sure, may I know your origin point? 
 customer: My source code is ATL. And I want with 1 connection. 
 agent: Sorry to inform that there is no flight found with your specification. 
 customer: Ok. Thank you for  information and your service. 
 agent: Thank you for reaching us.

A: no_flight
****
Q: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: Joseph Green here, I am planning to book a flight ticket to MCO from BOS. Can you please do it for me? 
 agent: Sure, can I know the travel dates please? 
 customer: Sure, I am looking for a flight on 08/26 and 08/28. 
 agent: Ok, wait a moment please. 
 customer: Ok, take your time. 
 agent: There is a flight in Hawaiian airline with price 200, can I book it? 
 customer: Fine, please reserve me a seat. 
 agent: Your ticket has been booked with flight number 1008. 
 customer: Thank you for the help. 
 agent: Thank you for approaching us.

A:
book
****