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

[EX Q]: customer: Hi. 
 agent: Hello, how can I help you? 
 customer: My name is Virginia Smith, can you please help me to cancel my reservation? 
 agent: Sure, I will help you. 
 customer: Thank you. 
 agent: There is no reservation on your name in our database. 
 customer: No problem. Thank you so much. 
 agent: Thank you for opting us.
[EX A]: no_reservation

[EX Q]: customer: Hello, I am Ryan Roberts. 
 agent: Hello, how can I assist you? 
 customer: I need to fly Austin for my brother's engagement, could you please help me in booking from JFK to AUS? 
 agent: Sure, when are you planning to travel? 
 customer: My journey is from 03/03 to 03/05. 
 agent: Please provide your specifications. 
 customer: I need a halt in mu journey. 
 agent: Unfortunately, there is no flights available based on your details. 
 customer: Ok, no worries. Thank you. 
 agent: Thank you.
[EX A]: no_flight

[EX Q]: customer: Hello. 
 agent: Hello, how may I aid you today? 
 customer: I am planning to book a ticket from MSP to SEA. Can you please help me out? 
 agent: Sure, please share me your travel dates. 
 customer: I am planning to travel on Dec 06 and return back on Dec 08. 
 agent: Do you need direct flight or connecting flight? 
 customer: I am looking for a connecting flight. 
 agent: For booking, we need your good name. Please mention it. 
 customer: My name is Nicole Mitchell. 
 agent: May I know your class preferences? 
 customer: I am looking for a economy class. 
 agent: We found a AA airline and 1012 is flight number with a fare of 100. Shall I proceed? 
 customer: That's fine, please proceed the booking. 
 agent: Your ticket is confirmed with an economy class. 
 customer: Thank you for your service. 
 agent: Thank you for opting us.
[EX A]:
book