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 help you? 
 customer: Please book a ticket from Orlando, FL-MCO to Philadelphia, PA-PHL. 
 agent: Sure, do you need any stopover in between your journey? 
 customer: Connections limit is 1. 
 agent: Kindly share your travelling dates. 
 customer: Travelling dates are from 10/22 to 10/24. 
 agent: Let me know your good name. 
 customer: I am Pamela Davis. 
 agent: Unfortunately, there is no flight found matching with your requirements. 
 customer: Thanks. 
 agent: Thanks for availing us.
Output:
no_flight