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: Hi. 
 agent: Hello. How may I help you? 
 customer: I want to cancel my recent reservation owing to an emergency. 
 agent: Sure, we are here to help you. May I know your name please? 
 customer: My name is Amy Hall. 
 agent: Sorry to inform you that there is no active reservation on your given name. 
 customer: Thank you.
Output:
no_reservation