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

Example Input: customer: Hello. 
 agent: Hello. How can I assist you? 
 customer: Is this Travel leaders agency? 
 agent: Yes. 
 customer: I am Ruth Campbell, I am planning to travel from Houston to Denver to meet my friends after a long time. 
 agent: Sure, I will help you to travel. May I know your airport codes? 
 customer: I am departing from HOU and my destination airport is DEN. 
 agent: Ok, can you please provide me your travelling dates? 
 customer: My departure from Houston is on 09/06 and return from Denver on 09/08. 
 agent: I am happy to say you this, I found a flight for you with 1 connection. Shall I proceed for booking? 
 customer: Yes, please proceed for booking. 
 agent: Your ticket is reserved with flight number 1003 and airline is Southwest. 
 customer: Thanks for your assistance. 
 agent: Thank you for choosing us. Welcome.
Example Output: book

Example Input: customer: Hello. 
 agent: Hello. May I know your name? 
 customer: Sure, I am Sandra Allen. 
 agent: How can I assist you today? 
 customer: Today, can you help me in booking a ticket to Atlanta? 
 agent: Sure, we are delighted to help you. When you are willing to travel to Atlanta? 
 customer: I am planning to meet my children and wife in Atlanta, as we planned to visit Georgia Aquarium on 03/21. 
 agent: Ok. May I know your recur date? 
 customer: We planned the trip for couple of dates, so I would like to go on 03/20 and I intend to return back on 03/22. 
 agent: Kindly share your airport codes? Do you want any lay bay in your journey? 
 customer: Sure, I will depart from New York, LGA and landing at Atlanta ATL. 
 agent: Ok. 
 customer: Yes, I am comfortable to travel if there is one stopover in between my journey. 
 agent: Please be online, I will check the availability and revert to you. 
 customer: Sure. 
 agent: Thanks for waiting,. 
 customer: Ok. 
 agent: Hawaiian airlines are providing service on your route with 1 connection. Can I proceed? 
 customer: Ok, please proceed for booking. 
 agent: Your booking is done with flight 1027. 
 customer: Thank you. 
 agent: Thank you for reaching us. 
 customer: Welcome.
Example Output: book

Example Input: customer: Hi, I am Mark Jones. 
 agent: Hello, how can I help you? 
 customer: Owing to an emergency, my boxing championship has been postponed. So I have a request to you to change my existing reservation? 
 agent: Sure, wait for some time. 
 customer: Sure. 
 agent: Thanks for waiting there is no reservations found on your name. 
 customer: Ok, no issues at all. Thanks for your assistance. 
 agent: Thanks for choosing us.
Example Output:
no_reservation