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. My name is Kevin White. 
 agent: Hello, How could I help you? 
 customer: I am planning to book a flight ticket from LGA to SFO. My preferable travelling dates are from 11/30 to 12/02. Please help me in booking process. 
 agent: Sure, Do you have any other requirements? 
 customer: Yes, I need one connected flight having fare as 200. 
 agent: Ok, Please wait for a moment. 
 customer: Ok. 
 agent: Thank you for waiting. Sorry to inform there is a direct flight which does not matches your requirement. 
 customer: It's ok, please don't book this ticket. 
 agent: Thank you for contacting us. Have a great day.
no_flight