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 assist you today? 
 customer: I need your assistance in cancelling the reservation, as my friend met with an accident. 
 agent: Sure, may I know your good name? 
 customer: The reservation was in the name of Linda Collins. 
 agent: Please wait for a moment. 
 customer: Sure, I will wait. 
 agent: Sorry to say that, no reservation was found with your good name. 
 customer: Fine, thank you. 
 agent: Thank you for reaching us.
Output:
no_reservation