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 assist you today? 
 customer: I need to book a flight ticket from IAD to OAK, Can you please help me for booking? 
 agent: Sure, may I know your good name please? 
 customer: Samuel Turner here. 
 agent: May I know on which dates you are willing to travel? 
 customer: I would like to travel on 02/12 to return on 02/14. 
 agent: May I know your class preference please? 
 customer: I am comfortable with any class. 
 agent: May I know your preferable time for journey? 
 customer: I would be return on morning. 
 agent: May I know your connection limit please? 
 customer: I need a connecting flight. 
 agent: There is a connecting flight of fare 300 with economy class in Frontier airline, shall I proceed for booking? 
 customer: Ok, proceed for booking. 
 agent: Your reservation has bee confirmed with flight number 1012, depart time is at 18:00 hours on Feb, 12 and return time is at 5:00 hours on Feb, 14. 
 customer: Thanks for your information. 
 agent: You are welcome.
book

customer: Hello. I am Dennis Campbell. 
 agent: Hello, how can I help you today? 
 customer: I am planning to attend music concert at OAK, can you please help me with booking a flight ticket from EWR? 
 agent: Sure, may I know your planned travel dates? 
 customer: Sure, I would like to take off on Feb 22 and return on Feb 24. 
 agent: Is there any class preference for you? 
 customer: No, but I would like to return during evening time. 
 agent: Do you have any other specifications? 
 customer: I need a flight with 1 connection. 
 agent: Sorry to say that, no flights were found with your given details. 
 customer: Ok, no issues. Thank you for checking. 
 agent: Thank you for reaching us. 
 customer: You are welcome.
no_flight

customer: Hi, I'm Janet Campbell. 
 agent: Hello, how may I assist you? 
 customer: I would appreciate if you can cancel my ticket reservation. 
 agent: Sure. Wait for a moment, I will check the details and get back to you. Unfortunately, no reservation found on your details. 
 customer: Thanks for your information. 
 agent: Thanks for contacting us.
no_reservation