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 be at your service today? 
 customer: Please help me to cancel my recent reservation. 
 agent: May I know your name please? 
 customer: Jonathan Harris. 
 agent: Sure, please wait for a moment. 
 customer: Sure. 
 agent: Sorry, there is no reservation matching with your name in our portal. 
 customer: Thank you for your information. 
 agent: Thank you for reaching us.
Output:
no_reservation