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

customer: Hello. 
 agent: Hello, how may I support you today? 
 customer: I am Kimberly Johnson, I want to cancel my ticket has my plan for vacation at Washington is cancelled. Can you help me with that? 
 agent: Sure, we are here to help you. Please wait a moment. 
 customer: Sure. 
 agent: Thank you for your time, unfortunately no reservation found with your name. 
 customer: Ok, thank you for the information. 
 agent: Thank you for approaching us.
no_reservation