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. 
 customer: I am Elizabeth Wilson. 
 agent: How may I assist you today? 
 customer: Can you please help me in booking my flight ticket from IAD to PHL? 
 agent: Sure, please provide me your travel dates. 
 customer: Ok, my travelling dates are 09/12 and 09/14. 
 agent: Frontier airline is providing flight for you with price 100. Shall I proceed? 
 customer: Ok, please proceed. 
 agent: Your ticket has been booked with flight-1019. 
 customer: Thank you. 
 agent: My pleasure.
[EX A]: book

[EX Q]: customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: Can you please change my existing reservation? 
 agent: Sure, we are here to help you. May I know your name? 
 customer: Sure, I am Helen Wilson. 
 agent: Ok , wait for some time. 
 customer: Sure. 
 agent: Thanks for waiting there is no reservation found on your name. Thanks for approaching us.
[EX A]: no_reservation

[EX Q]: customer: Hello. 
 agent: Hello, how can I be your helping hand today? 
 customer: I have made an earlier reservation to attend for a exam, due to some issues my exams got postponed. Can you please assist me to change it? 
 agent: Sure, I am here to help you. 
 customer: Thank you. 
 agent: To proceed further, May I know your name? 
 customer: Brian Young is my name. 
 agent: Ok, please wait for a moment. 
 customer: Sure. 
 agent: Thank you for your time, There was no reservation found on your given name. 
 customer: That's Ok, thanks for your assistance. 
 agent: Thank you for opting us.
[EX A]:
no_reservation