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, I am Lisa Young. 
 agent: Hello, how can I assist you? 
 customer: I want to visit Lake Harriet at MSP, can you please book a ticket for me? 
 agent: Sure. Can you please provide the travelling dates? 
 customer: I intend to travel on 08/12 to 08/14. 
 agent: Do you have any limitations? 
 customer: Price 5000. I need 1 connection. 
 agent: Please share your airport codes. 
 customer: Origin: DFW. 
 agent: Thanks for the information. We did not found any flights matching your criterion. 
 customer: Ok. Thank you. 
 agent: Thanks for choosing us.

Ex Output:
no_flight


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: Hello. 
 agent: Hello. What service do you need from our agency? 
 customer: I would like to change my existing reservation, could you please help me? 
 agent: Sure, I will help you to change the ticket details. 
 customer: Thank you. 
 agent: Could you please mention your respective name? 
 customer: My name is Joshua Clark. 
 agent: Ok, please give me a couple of seconds to check the ticket status. 
 customer: Sure, I will wait for your response. 
 agent: I have not found any active reservation with your name in our system data to change the ticket details. Sorry for the trouble. 
 customer: No issues. Thank you for checking. 
 agent: That's my pleasure. Thank you for reaching us.

Ex Output:
no_reservation