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: Hi. 
 agent: Hello. Good Evening. 
 customer: I want to change my reservation to other locations for some personal issues. Can you please help me out? 
 agent: Sure, may I know your name? 
 customer: Myself Jonathan Evans. Can I have the information please? 
 agent: I am sorry Evans, there is no reservation found with your name to change. 
 customer: Its great, no issues. Thank you for the information. 
 agent: Your welcome.

Ex Output:
no_reservation


Ex Input:
customer: Hi. 
 agent: Hello, how may I aid you for the day? 
 customer: As my scheduled holiday trip got cancelled, I need your help in cancelling my reservation. 
 agent: Sure, I am here to help you. May I know your name to cancel the reservation? 
 customer: I am Paul Mitchell. 
 agent: Ok, I will check the recent reservation on your name and get back to you. 
 customer: Ok. 
 agent: There is no reservation found on your name to cancel. 
 customer: Ok, thanks for the information. 
 agent: Thank you for contacting us. Have a great day.

Ex Output:
no_reservation


Ex Input:
customer: Hi. 
 agent: Hello, how may I assist you? 
 customer: I am heading from Dallas & Fort Worth to meet my manager at San Francisco. Can you help me with the booking? 
 agent: Sure, may I know your airport codes? 
 customer: I intend to start from DFW to reach SFO. 
 agent: Please share me your trip dates. 
 customer: They are on 09/09 and 09/11. 
 agent: May I know your good name? 
 customer: My name is Karen Wright. 
 agent: There is no flight on your details. 
 customer: Ok, thank you for the information. 
 agent: Thank you.

Ex Output:
no_flight