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. 
 agent: Hello. How may I assist you today? 
 customer: Can you please help me to search a flight with 0 connection limit? 
 agent: Sure, I will help you with that, please share your airport codes? 
 customer: Thank you, the airport codes are from NY-LGA to IL-ORD. 
 agent: Ok, let me know your travelling dates? 
 customer: The travelling dates are 09/22 to 09/24. 
 agent: May I know your name please? 
 customer: Sure, my name is Catherine Rodriguez. 
 agent: Sorry Catherine, no flights as per your details. 
 customer: Ok, no problem. 
 agent: Thank you for reaching us. 
 customer: Thank you for your information.
Output:
no_flight