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 render you today? 
 customer: I need to cancel my reservation for a client meeting but I have got a sudden call from my friend that one of my friend got met with an accident so I feel to cancel my reservation. Can you please help me out? 
 agent: Sure, may I know your good name? 
 customer: Patrick Carter here. 
 agent: I have checked in reservation list to cancel your ticket, but could not find any reservation with your name. 
 customer: That's ok, thank you for your help. 
 agent: Thank you for choosing us.
no_reservation

customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: Can you find me a direct flight to Washington? 
 agent: Sure, I am here to help you. 
 customer: Thank you. 
 agent: Kindly, share your selected airport codes. 
 customer: My source point is OAK and destination is IAD. 
 agent: May I know that when you have planned to travel? 
 customer: I will fly on Sept 08 and return on Sept 10. 
 agent: Do you prefer a connection limit? 
 customer: I prefer a direct flight. 
 agent: Is there any other concerns to say? 
 customer: No. 
 agent: On whose name, you want to reserve the ticket? 
 customer: My name is Virginia Phillips. 
 agent: Ok, please wait for a few minutes. 
 customer: Sure. 
 agent: Sorry to say that, no flights are found based on your given information. 
 customer: Ok, thank you for the information. 
 agent: Thank you for choosing us.
no_flight

customer: Hello. 
 agent: Hello, how can I assist you? 
 customer: Please help me to book a flight ticket from HOU to DFW. 
 agent: May I know your travel dates? 
 customer: My travel dates are 31 Oct and 02 Nov. 
 agent: Do you prefer connecting flight? 
 customer: I need a connecting flight. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: May I know your good name? 
 customer: I am Brian Moore. 
 agent: We found a flight in an economy class with direct flight in Southwest airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight? 
 customer: Please proceed to booking. 
 agent: Your booking is done with flight number 1025. 
 customer: Thank you for helping me. 
 agent: Thank you for reaching us.
book