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

Example Input: customer: Hi. 
 agent: Hello, How can I assist you? 
 customer: Book my ticket with the name of Brenda Hall, as there is a Arts and crafts festivals at Charlotte, CLT. 
 agent: Sure, May I know your preferred travel dates? 
 customer: My preferable dates are from 12/12 to 12/14. 
 agent: Do you prefer any connections? 
 customer: Yes, I need. 
 agent: Where do you want to start from? 
 customer: Washington, IAD is my travelling point. 
 agent: Ok, please wait. 
 customer: Sure. 
 agent: We found a flight, with a single connection available for you. 
 customer: Ok. Confirm my ticket. 
 agent: The airline is Southwest, airfare is 100 & Flight number is 1023. 
 customer: Thank you for availing me. 
 agent: Your booking is done. Thanks for your presence.
Example Output: book

Example Input: customer: Hello. 
 agent: Hello, what can I do for you today? 
 customer: My name is Karen Hill and I want to book the flight ticket from LAS to EWR. Can you please help me? 
 agent: Sure, may I know your travel dates? 
 customer: My travel dates are May 17 and May 19. 
 agent: Let me know your class preference? 
 customer: I am comfortable with any class. 
 agent: Do you have any other requirements to be met? 
 customer: I need a single connection flight. 
 agent: Sorry, no flights found on your travel dates. 
 customer: Ok, thank you for the information. 
 agent: Thank you for contacting us.
Example Output: no_flight

Example Input: customer: Hi. 
 agent: Hello, how can I assist you? 
 customer: I need to cancel my reservation for a client meeting but I have got a sudden call from my friend that one of my friend got met with an accident so I feel to cancel my reservation. Can you please help me out? 
 agent: Sure, I am here to help you with that, can I know your good name to proceed further? 
 customer: Janet Perez here. 
 agent: Sorry, we found no reservation on your given name. 
 customer: That's ok, thank you for your help. 
 agent: Thank you for reaching us.
Example Output:
no_reservation