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, how best I can aid you at this moment? 
 customer: We are going to Washington, but first we should make a plane reservation. Can you please help me with this? 
 agent: Sure, I would like to make a reservation to Washington. 
 customer: Thank you for accepting my request. 
 agent: Could you please help me with your travelling airport codes? 
 customer: Sure, my airport codes are IAD - DCA. 
 agent: At what class, would you like to prefer to travel? 
 customer: I am fine with any class. 
 agent: Do you have any specific time for your journey? 
 customer: Yes, I would like to depart in afternoon time. 
 agent: When you are willing to travel to reach your destination? 
 customer: I have scheduled my trip dates on Nov 9th to 11th. 
 agent: Ok, Do you prefer to travel in a major airlines? 
 customer: I am comfortable with any airline. 
 agent: Thank you for sharing all the required details, please help me with your name. So, I can check the availability of flights. 
 customer: Jack Perez is my name. 
 agent: Please wait for a moment, I will inform you about the flight details as soon as possible. 
 customer: Ok, sure. 
 agent: Thanks for waiting, Jack Perez. 
 customer: Ok. 
 agent: Sorry for the inconvenience, there were no flights moving to your location due to sold out of tickets. 
 customer: It's sad to hear, but no issues at all. Thank you for the best service. 
 agent: Thank you for consulting our chat service. Hope we serve you again.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I assist you today? 
 customer: Edward Young here. I would like to change my recent reservation, can you help me? 
 agent: Ok, let me check with your existing reservation for a moment. 
 customer: Sure. 
 agent: Thank you for waiting. 
 customer: It's ok. 
 agent: I'm so sorry to inform you, there is no reservation found by your name in our data base. 
 customer: That's fine, anyway thanks for your help and valuable information. 
 agent: Thank you for approaching our agency.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I aid you? 
 customer: I want to book a ticket from DTW to LAX to attend Sports meet. 
 agent: Sure, we are pleased to serve you. 
 customer: Can you please book a ticket with single connection? 
 agent: Can you share me your itinerary dates? 
 customer: My travelling dates June 21 and June 23. 
 agent: Do you need any way station in your journey? 
 customer: Yes, I prefer single way station. 
 agent: Is there any class preference for you? 
 customer: No. 
 agent: Do you have any other preferences? 
 customer: Yes, I prefer normal-cost airline. 
 agent: May I know your good name please? 
 customer: Sure, Emma Collins here. 
 agent: Sorry to say, there are no flights available with your needs. 
 customer: Ok, Thank you. 
 agent: Thank you for availing us.
Output: no_flight