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 can I help you? 
 customer: I want to cancel my recent reservation. Can you please help me in that? 
 agent: Sure, I can help you with that. May I know your good name please? 
 customer: Larry Robinson here. 
 agent: Please wait while I'll check your reservation status. 
 customer: Ok. 
 agent: Larry Robinson, there is no active reservation found under your name to do cancellation. 
 customer: Ok, no problem. Thank you. 
 agent: Thank you for choosing us.

Output: no_reservation


Input: Consider Input: customer: Hi. I ma Margaret Thompson. 
 agent: Hello, How can I assist you? 
 customer: I would like to book a ticket from MSP, can you help me with booking to SFO? 
 agent: Sure, Please help me with your travel dates. 
 customer: My travelling dates are from 05/14 to 05/16. 
 agent: Please give a minute. 
 customer: Ok. 
 agent: Sorry, No flights found with your preferable dates. Thank you, Have a great day. 
 customer: Thank you.

Output: no_flight


Input: Consider Input: customer: Hello. 
 agent: Hello. How can I help you? 
 customer: My name is Thomas Taylor. I would like to spend my weekend at amusement park in Oakland. Can you help me in booking a ticket from JFK to OAK? 
 agent: On which dates you like to travel? 
 customer: My journey dates are 07/16 and 07/18. 
 agent: There is a flight with single connection, can I proceed for booking in 1019 flight? 
 customer: Please proceed. 
 agent: Your booking is confirmed it costs you 200. Thank you for choosing us. 
 customer: Thank you for your help.
Output: book