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: Hello,. 
 agent: Hello, How may I assist you today? 
 customer: My friends house warming function was postponed due to under construction. So I want to cancel my recent reservation. 
 agent: Sure, May I know your name please? 
 customer: Sure. I am Virginia Turner. 
 agent: Ok, please wait for a minute, I will check and let you know. 
 customer: sure. 
 agent: Thanks for your patience. Unfortunately, there is no reservation found with your name. 
 customer: Ok, no problem. 
 agent: Thank you for approaching us. 
 customer: Thank you for assisting me.
[EX A]: no_reservation

[EX Q]: customer: Hello. I am Jerry Hall. 
 agent: Hello Jerry Hall, how may I aid you? 
 customer: I planned to meet my cousin in SFO, can you please help me to book a flight ticket from SEA? 
 agent: Sure, please provide your itinerary dates. 
 customer: I prefer to travel on Jul 5 and Jul 7. 
 agent: Do you have any specifications? 
 customer: I would like to depart in evening in 1 connecting flight. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry, no flights are available as per your specifications. 
 customer: Ok, no problem. Thank you for your time. 
 agent: Thank you for choosing us.
[EX A]: no_flight

[EX Q]: customer: Hello. 
 agent: Hello, how may I help you? 
 customer: My name is Amanda Jackson. 
 agent: OK. 
 customer: I want to attend flower festival at Detroit, DTW. Can you help me in booking a flight ticket? 
 agent: Sure, please provide your dates of journey? 
 customer: My dates are 08/30 to 09/01. 
 agent: Ok, your boarding airport please? 
 customer: My boarding point is PHX. 
 agent: Ok, wait a moment. 
 customer: Sure. 
 agent: A flight in Hawaiian airline is available for you with fare 200. Shall I confirm 1000 flight? 
 customer: Ok, Confirm. 
 agent: Your ticket has been booked successfully. 
 customer: Ok, Thank you. 
 agent: Thanks for reaching us, have a nice day.
[EX A]:
book