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: Hello, Betty Lewis is my name. 
 agent: Hello, how may I assist you today? 
 customer: Can you please book a connected flight from Minneapolis & St. Paul, MN - MSP? 
 agent: Sure, we will help you. Ok, please let me know your journey dates. 
 customer: My journey dates are 02/27 and 02/29. 
 agent: May I know your destination point? 
 customer: I want to land at New York, NY - LGA. 
 agent: Ok, please wait for a while. 
 customer: Sure. 
 agent: Thanks for your time, we found a direct flight based on your given data. 
 customer: Do not proceed for booking. 
 agent: Ok. 
 customer: Thanks for your help. 
 agent: Thank you for choosing us.
Output:
no_flight