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

Input: Consider Input: customer: Hello. 
 agent: Hello. 
 customer: I am Karen Walker. 
 agent: How can I assist you? 
 customer: I want to book a ticket from PHL to JFK to attend seminar, can you help me in booking? 
 agent: Sure, please provide me your journey dates. 
 customer: I am departing on 03/17 and return on 03/19. 
 agent: Please wait for a minute. 
 customer: Sure. 
 agent: I found a flight in Southwest airlines with price 200. Shall I book the ticket for you? 
 customer: Please proceed for booking. 
 agent: Your ticket is confirmed and the flight number is 1018. 
 customer: Thank you. 
 agent: Thank you for contacting us.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how can I help you today? 
 customer: Can you please help me to book a flight from HOU to SEA? 
 agent: Sure, can you please mention your depart and arrival dates of your journey? 
 customer: My travel dates are Apr 06 to 08. 
 agent: Do you have any connection limit? 
 customer: I prefer connecting flight. 
 agent: Are there any other specifications? 
 customer: No. 
 agent: Can I know your good name? 
 customer: I am Alexander Turner. 
 agent: Sorry, no flights are available in this route as per your requested dates. 
 customer: No problem, thank you for the information. 
 agent: Thank you for reaching us.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello, how can I guide you today? 
 customer: Can you please help me with booking a flight ticket from OAK to SEA? 
 agent: Can you please share your travelling dates? 
 customer: My travelling dates are from Sept 22-24. 
 agent: Do you have class preference? 
 customer: I am comfortable with any class. 
 agent: Do you need connection limit? 
 customer: I would be comfortable with single stop over. 
 agent: May I know your name? 
 customer: Dennis Moore here. 
 agent: Sorry, no flight found in that route. 
 customer: No problem, thank you for the information. 
 agent: Thank you for choosing us.
Output: no_flight