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. 
 agent: Hello. 
 customer: I am Patricia Hernandez. 
 agent: How can I aid you today? 
 customer: Can you help me to change my reservation to next week? 
 agent: Sure, I am here to help you. Please hold on. 
 customer: Ok. 
 agent: Thanks for your waiting, there is no active reservation found on your name to change. 
 customer: Ok, no issues. Thank you for your time. 
 agent: Thank you for availing us, hope to serve you again.
Output:
no_reservation