Q: 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. Please let me know, What kind of service you are looking for today? 
 customer: Can you please help me to book a flight from HOU to AUS? 
 agent: Sure, we are here to help you. Can you help me by providing your travel dates? 
 customer: My travel dates are Oct 31 to Nov 02. 
 agent: Which flight you have preferred to travel either a connecting flight or a direct flight? 
 customer: I would prefer connecting flight. 
 agent: Do you have any other specifications to be met? 
 customer: I need to return at evening time. 
 agent:  If you can help me with your name, I can begin looking up for the availability of flights. 
 customer: Angela Allen here. 
 agent: Thank you for providing all necessary details, please hold a moment, let me check with the airlines and let you know. 
 customer: Sure. 
 agent: Thank you for waiting and we have found a flight in an economy class with 1 connection in American Airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight? 
 customer: Please proceed. 
 agent: Your booking is done with flight number 1011. 
 customer: Thank you. 
 agent: Thank you for opting us.
A:
book