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. I am Brenda Turner. 
 agent: Hello, how may I support you? 
 customer: I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Can you please help me with changing my reservation? 
 agent: Sure, let me check the status and revert you. 
 customer: OK. 
 agent:  I have checked in reservation list to cancel your ticket, but could not find any reservation with your name. 
 customer: Not an issue, thank you for the information. 
 agent: Thank you for picking us.
Output:
no_reservation