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. 
 customer: Myself Carol Thompson. 
 agent: How can I help you today? 
 customer: For some issues I want to cancel my reservation, can you please help me with it? 
 agent: Sure, I can help you with that. 
 customer: Thanks. 
 agent: Ok, please wait a moment, I will check your previous reservation status. 
 customer: Ok. 
 agent: There is no previous reservation available on your name. 
 customer: It's ok. 
 agent: Thank you for reaching us, have a good day. 
 customer: Thank you for the information.
Output:
no_reservation