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 can I guide you today? 
 customer: Can you help me in changing my recent reservation? 
 agent: Sure, I will help you. May I know your good name please? 
 customer: My name is Andrew Lopez. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Thanks for your time, there is no active reservation found on your name. 
 customer: Ok, No issues. Thank you. 
 agent: Thank you.
Output:
no_reservation