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: Hello. I am Dennis Campbell. 
 agent: Hello, how can I help you today? 
 customer: I am planning to attend music concert at OAK, can you please help me with booking a flight ticket from EWR? 
 agent: Sure, may I know your planned travel dates? 
 customer: Sure, I would like to take off on Feb 22 and return on Feb 24. 
 agent: Is there any class preference for you? 
 customer: No, but I would like to return during evening time. 
 agent: Do you have any other specifications? 
 customer: I need a flight with 1 connection. 
 agent: Sorry to say that, no flights were found with your given details. 
 customer: Ok, no issues. Thank you for checking. 
 agent: Thank you for reaching us. 
 customer: You are welcome.
Example Output: no_flight

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, how can I assist you today? 
 customer: My name is Jennifer Gonzalez. I am planning to travel from ATL to OAK to meet my friend, can you please help me for booking? 
 agent: Sure, Can you share me your trip dates please? 
 customer: My travelling dates are 10/30 and 11/01. 
 agent: Ok, wait for some time. We found Delta airline with single connection under fare of 100. Shall I proceed for booking with airline number 1007? 
 customer: I want a direct flight flight, can you please recheck it with 0 connection? 
 agent: Your ticket has been confirmed. Thanks for connecting us.
Example Output:
book