Instructions: 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
Input: customer: Hi. 
 agent: Hello, how can I help you? 
 customer: I would like to cancel my flight reservation as I am unwell, can you please help me? 
 agent: May I know your name please? 
 customer: Thank you. I am John Phillips. 
 agent: Sorry to say, there is no reservation on your name in our database. 
 customer: Not an issue. Anyway, thank you for the information. 
 agent: Thank you for opting us.
Output:
no_reservation