Definition: 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: Hello, I am Donald Mitchell. 
 agent: Hello, how may I render you? 
 customer: I would like to fly to Las Vegas, NV - LAS to meet my old friend to start a new business. Can you render me for booking on 08/08? 
 agent: Sure, I am gleeful to help you. Could you please mention your return date? 
 customer: Sure, I have a plan to return on 08/10. 
 agent: Let me know your preferred boarding point please? 
 customer: My boarding airport is Orlando, FL - MCO. 
 agent: Do you have any specifications? 
 customer: I need a direct flight. 
 agent: Thank you for providing details. Sorry to notify you that there is no direct flights available on provided details. 
 customer: Ok, thanks for your information. 
 agent: Thank you for connecting with us.
Output:
no_reservation