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, I am Larry Campbell. 
 agent: Hello, how can I help you? 
 customer: I want to meet my college friend at San Francisco, SFO. 
 agent: Ok. 
 customer: Can you help me in booking with a connecting flight? 
 agent: Sure, we are mirthful to help you. 
 customer: Thank you. 
 agent: Can you please let me know your journey dates? 
 customer: My travelling dates are from 10/23 to 10/25. 
 agent: What is your take off airport code? 
 customer: I am boarding at Boston, BOS. 
 agent: Please wait a minute, I will search a flight for you. 
 customer: Sure. 
 agent: Thanks for your time. 
 customer: Ok. 
 agent: Unfortunately, there are no flights found on your route. 
 customer: Ok, No problem. Thanks for the information. 
 agent: Thank you for choosing us.
no_flight

customer: Hello. 
 agent: Hello. How can I help you? 
 customer: I am Kenneth Thomas. My trip has been postponed, can you change my reservation? 
 agent: Sure, wait for a minute. 
 customer: Ok. 
 agent: Sorry Kenneth, no reservation found on your name. 
 customer: It's fine. 
 agent: Thank you for reaching us. 
 customer: Anyway, thank you for your information.
no_reservation

customer: Hello. 
 agent: Hello, how may I guide you? 
 customer: I am Paul Adams, want to cancel my recent reservation. Will you please help me with that? 
 agent: Ok. Sorry, but there is no reservation with your name. 
 customer: It's ok, thank you for your help. 
 agent: Most welcome.
no_reservation