instruction:
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
question:
customer: Hello, I am Dennis Mitchell. 
 agent: Hello,Mitchell. How shall I guide you? 
 customer: My business meeting has been postponed, so I want to change my existing reservation. Can you guide me for changing an reservation? 
 agent: Definitely,let me check. 
 customer: Sure. 
 agent: Sorry,no reservation has found on your name. 
 customer: Ok, no problem. Thanks for your service. 
 agent: Thank you for approaching us.
answer:
no_reservation


question:
customer: Hello. 
 agent: Hello, how can I assist you? 
 customer: Could you please help me in flight ticket booking process from AUS to OAK? 
 agent: Sure, I can help you with that. May I know your travel dates please? 
 customer: Thank you for your response, I want to take off on Dec 11 and book my return ticket also on Dec 13. 
 agent: May I know how many stopovers do you need in between your journey? 
 customer: Yes, I want a connecting a flight. 
 agent: Please let me know if you have any other specifications. 
 customer: I would like to travel in business class flight. 
 agent: Can I have your good name please? 
 customer: Sure, my name is Larry Hernandez. 
 agent: Ok, please wait. 
 customer: Ok. 
 agent: Sorry to inform you that there are no flights available for you on those dates with your given details. 
 customer: Oh! It's ok no problem. Thank you for your information. 
 agent: Thank you for choosing us.
answer:
no_flight


question:
customer: Hello. 
 agent: Hello. 
 customer: Jonathan Lewis here. 
 agent: How may I guide you? 
 customer: Can you please help me in booking a flight ticket from HOU to IAD? 
 agent: Sure, I am gleeful to help you. Can you please provide me your trip dates? 
 customer: Sure, my travel dates are from 11/15 to 11/17. 
 agent: Please wait for a minute. 
 customer: Sure, I will wait for your response. 
 agent: There is a direct flight in AA airlines with the flight 1028 and price is 100. Shall I proceed? 
 customer: Ok, please proceed with booking. 
 agent: Ok, your ticket is booked successfully. 
 customer: Thank you for booking. 
 agent: Thank you for approaching us, have a nice day.
answer:
book