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 may I help you? 
 customer: I am Nicole Collins. Owing to an emergency  I want to cancel my recent reservation. 
 agent: Sure, Please wait for a moment. 
 customer: Ok. 
 agent: Thanks for waiting, No reservation found with your name. 
 customer: Ok, no problem . Thank you for the information. 
 agent: Thank you for choosing us, Have a good day.
Output:
no_reservation