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: Hi. 
 agent: Hello. How may I guide you today? 
 customer: I want to fly from LAS to ORD. Can you check the flight availability on that route? 
 agent: Sure, I will help you with that. Can you please share your preferable travel dates? 
 customer: My planned travel dates are 08/09 and 08/11. 
 agent: May I know your name please? 
 customer: Sure, Frank Collins here. 
 agent: Do you have any class preference? 
 customer: I am comfortable with economy class. 
 agent: Is there any other requirements regarding your journey? 
 customer: I want a flight with single connection. 
 agent: United Airlines are providing a flight with single connection limit and the ticket fare is 100. Shall I book it? 
 customer: Yes, you can proceed with that booking. 
 agent: Frank Collins, your booking has been done in economy class. 
 customer: Thank you for the booking. 
 agent: Thank you for reaching us, have a safe journey.
book