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: Hello, I am David King. 
 agent: Hello, how may I help you? 
 customer: As my manager did not approve my leave, I would like to change my reservation. 
 agent: Sure. Please let me a moment. 
 customer: Ok, take your time. 
 agent: Sorry, there is no reservation found on your name. 
 customer: That's ok, thank you for checking. 
 agent: Welcome. Thank you for reaching us. 
 customer: Welcome.
[A]: no_reservation


[Q]: customer: Hi. 
 agent: Hello. 
 customer: I am Mary Brown. 
 agent: How may I assist you? 
 customer: I would like to visit Oakland California temple on Aug 17. Can you help me in booking a flight ticket? 
 agent: Sure, I will help you. May I know your source airport code please? 
 customer: My take off airport code is IAH. 
 agent: Do you have any plans on your return journey? 
 customer: Yes, I intend to return on Aug 19. 
 agent: Do you have any specifications? 
 customer: There should be a lay by in between my journey. 
 agent: Mary Brown, no flights has been found on your planned travel dates. 
 customer: Ok, I will check with another agency. Thank you for the information. 
 agent: Thank you for choosing us.
[A]: no_flight


[Q]: customer: Hello. Is this a flight ticket booking agency? 
 agent: Please let me know, what kind of service your looking for? 
 customer: Yes, I have seen that your agency can help the customer in flight ticket booking. So, now please help me with ticket booking from DTW to MCO. Can you help me in that one? 
 agent: Sure, please share me your trip dates. 
 customer: Thank you and I have planned to travel in the month of Nov and the travel dates would be 11 and 13. 
 agent: May I know your airlines preferences? 
 customer: I am ok with any airlines. 
 agent: Please share me your connection limit. 
 customer: I am looking for a single connection flight in between my journey. 
 agent: Is there any class specifications for you? 
 customer: No, that's it. The above mentioned are my requirements, check with that one. 
 agent: We found a Delta airline and 1023 is flight number with a fare of 200. Shall I proceed? 
 customer: I am Janet Young and you can proceed with booking the ticket on my name. 
 agent: Your ticket is confirmed with an economy class. 
 customer: Thank you for your immediate response with my flight ticket reservation. 
 agent: Thank you for reaching us. 
 customer: Welcome.
[A]:
book