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. My name is Deborah Lee. 
 agent: Hello, how may I help you? 
 customer: I want to change my recent reservation due to some health issue. 
 agent: Sure, please give me a moment, I will check the possibilities. 
 customer: Ok. 
 agent: Sorry Lee, there is no reservations on this name. 
 customer: It's ok. No problem. Thank you. 
 agent: Thanks for approaching us.
Output:
no_reservation