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, I am Larry Robinson. 
 agent: Hello, how can I assist you today? 
 customer: Please book me a flight ticket to Chicago, IL - ORD from Oakland, CA - OAK. 
 agent: Sure, may I know your journey dates? 
 customer: My journey dates are on 08/25 to 08/27. 
 agent: Ok, Please share your budget. 
 customer: I can bare up to 5000. 
 agent: Ok, thanks for your details please wait. 
 customer: Sure. 
 agent: Thanks for waiting, we found a direct flight in Hawaiian airline. 
 customer: Do not proceed for booking. 
 agent: Ok. 
 customer: Thanks for your service. 
 agent: Thank you for choosing us.
no_flight