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 support you today? 
 customer: I am Lisa Scott, please find a flight for me on 12/22 and returning on 12/24. I need a flight with single connection. 
 agent: Sure, please provide your price limit. 
 customer: Sure, it is 5000. 
 agent: Ok, please provide your travelling airport codes. 
 customer: I will fly from TX-AUS to CA-SFO to attend a friend Wedding. 
 agent: Ok, please wait for a while. 
 customer: Sure. 
 agent: Thank you for being patient, No flights were available with your given details. 
 customer: Ok, thanks for the information. 
 agent: Thank you for connecting with us.

Output: no_flight


Input: Consider Input: customer: Hi. 
 agent: Hello, how may I help you? 
 customer: Can you book a ticket for me with my name Elizabeth Green? 
 agent: Sure, may I know airport codes? 
 customer: Thank you, my preferable locations are from PHX to DTW. 
 agent: May I know your trip dates? 
 customer: Sure, my planned dates are from 11/29 and 12/01. 
 agent: There is a flight for you with 1 connection. Shall I proceed? 
 customer: Please proceed. 
 agent: Your ticker is booked. 
 customer: Thanks for your response and great service. 
 agent: Most welcome.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I aid you now? 
 customer: Can you please help me in booking a flight ticket to JFK from OAK? 
 agent: Ok, may I know your planned dates for this journey? 
 customer: Sure, my planned dates of journey are Feb 01 and Feb 03. 
 agent: Ok, may I know your connection limit? 
 customer: Yes, I need single connecting flight. 
 agent: Do you have any other requirements? 
 customer: No. 
 agent: Meanwhile, may I know your name? 
 customer: Sure, my name is Patricia Walker. 
 agent: Flight-1029 is available for you with 1 connection by American Airlines with economy class with depart time at 15:00 hours and return time at 14:00 hours. Can I book it for you? 
 customer: Yes, you can you book the flight for my journey. 
 agent: Patricia Walker, your ticket is successfully booked. 
 customer: Thank you for your kind service. 
 agent: Thank you for connecting with our services.
Output: book