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 support you? 
 customer: I am Anna Edwards. I would like to visit Lady Bird Lake at San Francisco  with my friend, please help me in booking a ticket from MSP to SFO. 
 agent: Sure, may I know how much can you spend for this booking? 
 customer: I can pay up to 500. 
 agent: Are you looking for an economy class or business class ticket? 
 customer: I need a economy class flight. 
 agent: On what dates are you planning to travel? 
 customer: My travelling dates are 01/22 and return on 01/24. 
 agent: Do you need a stop over in the middle of your journey? 
 customer: I need a stopover in between the journey. 
 agent: At what time do you prefer to travel? 
 customer: No restriction on time. 
 agent: Ok, please be on hold for sometime, as I can check a flight for your journey with the best airlines. 
 customer: Sure. 
 agent: Hawaiian airline with flight number 1009 is leaving in the evening with a total tariff of 100. Is that fine? 
 customer: You can proceed with booking. 
 agent: Your booking has been done in economy class. 
 customer: Thank you. 
 agent: Thank you for picking us.
Output:
book