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
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Question: customer: Hi. 
 agent: Hello, how can I help you? 
 customer: Help me in booking a flight from EWR to IAH? 
 agent: Sure, I am happy to help you. Can you please help me with your travelling dates? 
 customer: I like to travel on Sept 19 to 21. 
 agent: Do you prefer any stopover in between journey? 
 customer: I prefer to travel in single connection flight. 
 agent: Are there any other specifications for you? 
 customer: No. 
 agent: May I know your good name? 
 customer: I am Matthew Walker. 
 agent: American Airlines is providing connecting flight with the ticket fare of 200 and depart time is 0:00 hours, arrival time is 17:00 hours. Shall I proceed? 
 customer: Proceed for booking. 
 agent: Ok, your ticket is reserved in an economy class and the flight number is 1002. 
 customer: Thank you very much. 
 agent: Thank you for choosing us.

Answer: book


Question: customer: Hi, Patrick Smith here. 
 agent: Hello. How can I help you? 
 customer: We friends were planning to go for Nutshell Bike Tour to Austin, TX-AUS on 08/16. Can you hold me a ticket with single connecting flight? 
 agent: Sure, may I know source code and return journey date please? 
 customer: Sure, I will be back on 08/18 at Orlando, FL-MCO. 
 agent: There is a flight with single connection, can I proceed for booking in 1004 flight? 
 customer: Ok, please proceed. 
 agent: Your booking is done in UA airlines, have a safe journey. 
 customer: Thank you. 
 agent: Thank you for choosing us.

Answer: book


Question: customer: Hi. 
 agent: Hello. How may I guide you today? 
 customer: I want to change my existing reservation. Can you help me for that one? 
 agent: Sure, I will help you with that. Can I know your name to check your previous reservation? 
 customer: Sure, Kevin Allen here. 
 agent: Please be on hold to check. 
 customer: Sure. 
 agent: We regret to inform you that, there is no reservation found on your name in our reservation list. 
 customer: No issues, thank you for the information. 
 agent: Thank you for approaching us, have a great day.

Answer:
no_reservation