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. How can I assist you today? 
 customer: I want to cancel my recent reservation which I have done last week because my trip got cancelled. Please help me out with that. 
 agent: Sure, please provide your name for checking the reservation. 
 customer: Myself Dorothy Young. 
 agent: Please give me a moment. 
 customer: Sure. 
 agent: Thanks for waiting, there is no reservation found under your name. 
 customer: It's ok, thank you for your help. 
 agent: Welcome, have a great day.
Output:
no_reservation