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
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Question: customer: Hello. 
 agent: Hello. What can I do for you today? 
 customer: I have to change my reservation details as I have given some wrong airport codes and dates. So please help me with changing my reservation. 
 agent: Ok, may I know your name to check with your existing reservation? 
 customer: Sure, myself James Martinez. 
 agent: Ok, please wait for a moment till I check with it. 
 customer: Sure, take your time to check the reservation status. 
 agent: James Martinez, there is no reservation found by your name. Sorry for the inconvenience. 
 customer: Oh! May be booking has not done properly. 
 agent: Thank you for consulting with our agency, have a nice day. 
 customer: Anyway, thank you for your time.

Answer: no_reservation


Question: customer: Hello. 
 agent: Hello. How may I aid you today? 
 customer: I want to change my destination airport code in my existing reservation, can you please help me out? 
 agent: Sure, I will help you with that. 
 customer: Thank you. 
 agent: May I know your name please? 
 customer: Sure, my name is Nicholas Taylor. 
 agent: I am sorry to say that there is no reservation found under your details. 
 customer: It's ok, thank you for the information. 
 agent: Thank you for reaching us.

Answer: no_reservation


Question: customer: Hello. 
 agent: Hello, how can I help you? 
 customer: I am Samuel Anderson. My business meeting has been postponed.So, I would like change my existing reservation. 
 agent: Sure. 
 customer: Can you please help me with that? 
 agent: There is no reservation on your name. Thanks for reaching us. 
 customer: Ok, no problem. Thank you for your help.

Answer:
no_reservation