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 may I help you at this moment? 
 customer: I want to attend a Marriage in Chicago. Can you please help me for booking the flight ticket? 
 agent: Sure, Let me know your boarding point. 
 customer: My boarding point is SEA. 
 agent: Can you please share your depart and arrival dates? 
 customer: My travelling dates are July 07 and July 09. 
 agent: Ok, May I know your connection limit? 
 customer: I prefer single connecting flight. 
 agent: Is there any other preferences? 
 customer: No, I don't have any other preferences. 
 agent: To proceed further, may I know your name please? 
 customer: My name is Emma Perez. 
 agent: We are happy to inform you that, we found a direct flight in 1022 Spirit Airline with a fare of 200. Can I proceed for booking? 
 customer: Please proceed for booking the flight ticket. 
 agent: Sure, your ticket has been reserved. 
 customer: Thanks for helping me. 
 agent: Thank you for approaching us.

Output: book


Input: Consider Input: customer: Hi. 
 agent: Hello. How may I help you today? 
 customer: Janet Adams here, can you find a flight for me from CLT to PHX? 
 agent: Please mention your travelling dates? 
 customer: Ok, my trip dates are from Dec 15 to 17. 
 agent: Do you need any connecting flight for this journey? 
 customer: Yes, I need a connecting flight. 
 agent: May I know your budget for this travel? 
 customer: I am ok with any price. 
 agent: Do you need any specifications? 
 customer: No. 
 agent: Please wait a moment. 
 customer: Sure, take your time. 
 agent: There is a flight in Southwest airlines with the price 100 in economy, can I proceed with the reservation? 
 customer: Yes, please. 
 agent: Your ticket has been reserved with the flight number 1003. 
 customer: Thanks for your assistance. 
 agent: Thank you for reaching our service.

Output: book


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I assist you? 
 customer: I am Donald Garcia. My business meeting is postponed, so I need your help me to change my existing recent reservation, can you help me? 
 agent: Donald, please wait for a moment. 
 customer: Ok. 
 agent: I am sorry Donald, there is no reservation with your details. 
 customer: Thank you for your service. 
 agent: Thank you for contacting us.
Output: no_reservation