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, my name is David Thompson. 
 agent: Hello David,. How can I help you now? 
 customer: Due to sudden change in weather where I wanted to visit, I need to cancel the ticket. 
 agent: Ok sure, please wait a moment. Thank you for waiting. Sorry David, no reservation is found under your name. Thank you for choosing us. 
 customer: Ok that's fine, thank you for giving a instantaneous response. 
 agent: You are welcome, have a good day.

Output: no_reservation


Input: Consider Input: customer: Hello. 
 agent: Hello, how may I help you? 
 customer: My name is Amanda Jackson. 
 agent: OK. 
 customer: I want to attend flower festival at Detroit, DTW. Can you help me in booking a flight ticket? 
 agent: Sure, please provide your dates of journey? 
 customer: My dates are 08/30 to 09/01. 
 agent: Ok, your boarding airport please? 
 customer: My boarding point is PHX. 
 agent: Ok, wait a moment. 
 customer: Sure. 
 agent: A flight in Hawaiian airline is available for you with fare 200. Shall I confirm 1000 flight? 
 customer: Ok, Confirm. 
 agent: Your ticket has been booked successfully. 
 customer: Ok, Thank you. 
 agent: Thanks for reaching us, have a nice day.

Output: book


Input: Consider Input: customer: Hi. 
 agent: Hello. 
 customer: Daniel Perez here. 
 agent: How can I help you Daniel? 
 customer: Unfortunately, I want to cancel my recently done reservation can you please help me in this? 
 agent: Sure, please wait. I will get back to you. 
 customer: Ok. 
 agent:  I have checked and seen that there is no reservation found under your name. 
 customer: That's fine. 
 agent: Thank you, have a good day. 
 customer: Thank you for your service. 
 agent: You are welcome.
Output: no_reservation