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, I am Betty Walker. 
 agent: Hello, how can I assist you today? 
 customer: I am planning to meet my friend in Atlanta, can you please help me to book a flight ticket? Make sure that my price limit is 1000. 
 agent: Sure, can you please provide your journey dates? 
 customer: My travelling dates are from 06/21 to 06/23. 
 agent: How many connections do you need in between journey? 
 customer: I need a flight with single connection. 
 agent: Please mention your source and destination airport codes. 
 customer: I am travelling from NV - LAS to GA - ATL. 
 agent: Ok, please for a couple of minutes. 
 customer: Ok. 
 agent: We are glad to inform you that, we found a flight Delta airlines, flight number 1000, price is 100. 
 customer: Ok, you can proceed with my booking. 
 agent: Ok, your ticket has been reserved. 
 customer: Thanks for your service. 
 agent: Thank you for reaching us. 
 customer: Thank you.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I serve you at this moment? 
 customer: Myself Kenneth Parker, I have to attend my friend marriage at Charlotte. Can you please help me in reserving the ticket from MCO to CLT? 
 agent: Sure, I will help you. Please send your travelling dates. 
 customer: I am willing to leave on Oct 02 and again I will rertrieve on Oct 04. 
 agent: Do you have any limitations? 
 customer: I mostly prefer for single connection. Can you please check for this? 
 agent: There is a direct flight available with AA airline, shall I book it? 
 customer: Yes, please go ahead and reserve the ticket. 
 agent: Your booking is done with flight number 1026. Happy journey. 
 customer: Thank you very much for reserving the ticket. 
 agent: You are welcome, have a nice day.

Output: book


Input: Consider Input: customer: Hi. 
 agent: Hello. What can I do for you at this moment? 
 customer: I want to travel from ATL to PHL, can you please avail me a flight ticket? 
 agent: Sure, may I know your travelling dates? 
 customer: My travelling dates are from Aug 1st to Aug 3rd. 
 agent: Can I know your good name please? 
 customer: I am Donna Edwards. 
 agent: Do you have any other preferences? 
 customer: I want a break in between my journey. 
 agent: We found a Spirit Airlines with fare of 100 and a lay by in between the journey matches your schedule. 
 customer: Please proceed. 
 agent: Your ticket has been confirmed with flight number 1013. 
 customer: Thank you. 
 agent: Thank you for reaching us.
Output: book