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: Hi. 
 agent: Hello, how can I help you today? 
 customer: I am willing to book a flight from MCO to reach PHX, can you please help me in booking? 
 agent: Sure, let me know your travelling dates? 
 customer: My travelling dates are on Feb 1st to 3rd. 
 agent: Do you have any connection limit? 
 customer: Yes, I prefer a connected flight. 
 agent: Is there any other preferences? 
 customer: I would like to return in morning time. 
 agent: May I know your good name? 
 customer: My name is Virginia Taylor. 
 agent: Thanks for your details, there is no flight found on your desired journey routes. 
 customer: No issues, thank you. 
 agent: Thank you for availing us.
Output:
no_flight