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 assist you today? 
 customer: I would like to travel from ORD to LAX to meet my cousin, please help me with booking. 
 agent: Sure, I will help you. Please share me your trip dates? 
 customer: My travelling dates are from 03/24 to 03/26. 
 agent: Do you need a flag stop within your journey? 
 customer: I need a stop over in between. 
 agent: May I know your name please? 
 customer: I am Sharon Brown. 
 agent: Please stand b.y. Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions. 
 customer: Fine, thanks for the information. 
 agent: Thanks for your approach.
Output:
no_flight