You will be given a definition of a task first, then some input of the task.
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? 
 customer: I want to cancel my reservation, due to the heavy rainfall from a couple of days. 
 agent: Sure, let me check the status and revert you. May I know your name? 
 customer: My name is Justin Garcia. 
 agent: Ok, please wait. 
 customer: Sure. 
 agent: We could not find any reservation on your name. 
 customer: That's ok. 
 agent: Thank you for opting us. 
 customer: Thanks for your kind information.
Output:
no_reservation