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 can I help you today? 
 customer: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation? 
 agent: Let me know your name to check your reservation? 
 customer: I am Stephanie Carter. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: Thank you for waiting. I have checked in reservation list to cancel your ticket, but could not find any reservation with your name. 
 customer: No problem, thank you for the information. 
 agent: Thank you for choosing us.
Output:
no_reservation