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: Hi. 
 agent: Hello, how can I help you today? 
 customer: Can you please help me in changing my recent reservation? 
 agent: Sure, can I have your name please? 
 customer: Sure, my name is Sharon Parker. 
 agent: Ok, please wait for a while. 
 customer: Sure. 
 agent: Thanks for waiting, there is no active reservation on your given name. 
 customer: Ok, No issues. Thanks you. 
 agent: Thank you for opting us.
Example Output: no_reservation

Example Input: customer: Hello. 
 agent: Hello. How can I assist you today? 
 customer: I have a meeting with foreign delegates at San Francisco. Can you help me in booking a ticket? 
 agent: Sure, please share your airport codes. 
 customer: The airport codes are EWR and SFO respectively. 
 agent: On which dates do you want to travel? 
 customer: I am planning my journey on dates 02/26 and 02/28. 
 agent: Please may I know your name? 
 customer: My name is Samuel Moore. 
 agent: Flight 1022 of AA airline  available for you on your route with 1 connection. 
 customer: Please book the ticket. 
 agent: Your ticket is confirmed successfully. 
 customer: Thank you for your assistance. 
 agent: Thank you for choosing us, have a good day.
Example Output: book

Example Input: customer: Hello. 
 agent: Hello. How may I assist you? 
 customer: Can you help me to book a flight ticket from EWR to PHL? 
 agent: Sure, may I know your planned travel dates please? 
 customer: I want to take off on 11 July and return on 13 July. 
 agent: May I know your name please? 
 customer: I am Jennifer Rodriguez. 
 agent: Do you need a connecting flight or a direct flight? 
 customer: I am ok with any connecting. 
 agent: May I know your class preference? 
 customer: No. 
 agent: Do you have any other specifications? 
 customer: No. 
 agent: I found an economy class in Hawaiian airlines with fare 100 and it has single connection. Can I book your ticket? 
 customer: Please proceed. 
 agent: Ok, your booking is confirmed with flight number 1016. 
 customer: Thanks for helping me. 
 agent: Thank you for approaching us.
Example Output:
book