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, I am Kimberly Turner. 
 agent: Hello, what can I do for you today? 
 customer: I need to change my reservation as my get together program postponed. Can you help me? 
 agent: Sure, please wait for few minutes. 
 customer: Sure. 
 agent: There is no recent reservation found on your name in our data base. 
 customer: That's Ok, thanks for your assistance. 
 agent: Thank you for reaching us.

Output: no_reservation


Input: Consider Input: customer: Hi. 
 agent: Hello, how may I assist you? 
 customer: I am Laura Carter here, I want to reserve my ticket from BOS to PHL, can you please help me in booking? 
 agent: May I know your trip dates? 
 customer: Sure, my planned dates of journey are from Sep, 01 to Sep, 03. 
 agent: May I know your connection limit? 
 customer: Yes, I need a connecting flight. 
 agent: Is there any class preference? 
 customer: Yes, I need a business class. 
 agent: Ok, can you share your name to proceed further? 
 customer: I have mentioned. 
 agent: Ok, do you have any other specifications? 
 customer: No. 
 agent: Ok, please wait. 
 customer: Sure, I will wait. 
 agent: Sorry, there are no flights found with your required details. 
 customer: Ok, no problem. Anyways, thank you for your service. 
 agent: Thank you for reaching us.

Output: no_flight


Input: Consider Input: customer: Hello,. 
 agent: Hello, how can I aid you today? 
 customer: Please book a ticket from Seattle, WA-SEA to Houston, TX-IAH. 
 agent: Sure, we are here to help you. Kindly provide me your travel dates. 
 customer: Departure is by 06/23 and will return on 06/25. 
 agent: How much can you afford for this journey? 
 customer: I can afford up to 500. 
 agent: Ok, please wait a moment. 
 customer: Sure. 
 agent: There is a flight with your requirement, airline is Delta with price 600. Shall I proceed with booking? 
 customer: Please do not book flight. 
 agent: Ok. May I know your name? 
 customer: I am Stephanie Baker. 
 agent: Thanks for reaching us. 
 customer: Thanks.
Output: no_flight