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 help you out? 
 customer: I would like to cancel my previous ticket, can you please help me to do that? 
 agent: Sure, I will help you in cancelling the reservation. May I know your name please? 
 customer: Thank you for considering my request. My name is Raymond Hill. 
 agent: Sorry, there are no reservations found on your name. 
 customer: It's ok, anyways thank you for your time. 
 agent: Thank you for reaching us. 
 customer: You are welcome.
Output:
no_reservation