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 help you? 
 customer: Can you book a ticket for me with my name Elizabeth Green? 
 agent: Sure, may I know airport codes? 
 customer: Thank you, my preferable locations are from PHX to DTW. 
 agent: May I know your trip dates? 
 customer: Sure, my planned dates are from 11/29 and 12/01. 
 agent: There is a flight for you with 1 connection. Shall I proceed? 
 customer: Please proceed. 
 agent: Your ticker is booked. 
 customer: Thanks for your response and great service. 
 agent: Most welcome.
book

customer: Hi, I am Kimberly Nelson. 
 agent: Hello, How can I help you today? 
 customer: I am one of the best hacker in my company, unfortunately my Las Vegas, NV - LAS branch websites was hacked by some one so they called me to solve that problem. Can you help me to book a connecting flight? 
 agent: Sure, can you please share me your travel dates? 
 customer: I want to fly on 01/10 and recur on 01/12. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: Can you please share me your airport code? 
 customer: I want to board from Washington DC - DCA. 
 agent: Ok, please wait  a moment. 
 customer: Sure. 
 agent: Sorry to say, no flights found with your requirement. 
 customer: Ok, thank you. 
 agent: Thanks for reaching us.
no_flight

customer: Hello. 
 agent: Hello, how can I assist you today? 
 customer: I want to reserve my ticket from SEA to DTW, can you please help me to book a ticket? 
 agent: Sure, please share me your trip dates. 
 customer: Sure, my planned dates of journey are from Jun, 24 to Jun, 26. 
 agent: Do you need any connection limit? 
 customer: Yes, I want a direct flight. 
 agent: Do you have any specific class preference? 
 customer: I am ok with any class preference. 
 agent: Do you need any other requirements? 
 customer: Not required. 
 agent: May I know your name? 
 customer: Sure, my name is Debra Wilson. 
 agent: I found a flight in economy class with Hawaiian Airlines and ticket fare of 100. Shall I proceed? 
 customer: Ok, you can book it. 
 agent: Your ticket is confirmed with flight 1004. 
 customer: Thank you for your help in booking my ticket. 
 agent: Thank you for choosing us.
book