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

Ex Input:
customer: Hello. 
 agent: Hello, how may I assist you today? 
 customer: I want to change my existing reservation due to my board exams. Can you help me for that one/. 
 agent: Sure, I am here to help you. May I know your name please? 
 customer: Sure, my name is Nicolas Edwards. 
 agent: Please wait for a while. 
 customer: Sure. 
 agent: Sorry to inform you that there is no active reservation found on your given name. 
 customer: No issues, thank you for the information. 
 agent: Thanks for contacting us.

Ex Output:
no_reservation


Ex Input:
customer: Hello. 
 agent: Hello. 
 customer: Donald Scott here,. 
 agent: How may I help you? 
 customer: I want to cancel my ticket due to snow storm in my place. 
 agent: Donald Scott, I am willing to help you for this. Let me check your reservation status in our database. 
 customer: Ok. 
 agent: Donald Scott sorry to intimate, I found a reservation and cancelled sucessfully with your criteria. 
 customer: Thank you. 
 agent: You are most welcome, thank you very much for utilizing our agency.

Ex Output:
cancel


Ex Input:
customer: Hello. I am Eric Carter. 
 agent: Hello, how may I aid you? 
 customer: Due to sudden changes, my exams has been postponed. Can you please change my reservation? 
 agent: sure, we are perky to help you. 
 customer: Thank you. 
 agent: Please wait for a while. 
 customer: Ok. 
 agent: There is no active reservation found on your name in our database. 
 customer: Ok, not an issue. Thank you for your information. 
 agent: Thank you for choosing us.

Ex Output:
no_reservation